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Balance Equations

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  • Tim saved $12.00 from his allowance, half of what he received. What was his total allowance?
    $12.00
    $24.00
    $21.50
    $26.00
  • The 2 pans of the scales are balanced. Find the value for the unknown mass A.
    47 g
    11 g
    3 g
    5 g
  • Solve the equation.
    1
    -11
    -12
    36
  • Write an expression modelled by this picture.
    2<i>x</i> + 3
    2<i>x</i> - 6
    2<i>x</i> - 3
    2<i>x</i> + 9
  • Tiles are arranged on each side of the line to represent an equation. What is the equation?
    <i>2x</i> = -1,&nbsp;<i>x = -1</i>
    <i>2x</i> = 1,&nbsp;<i>x = 1</i>
    <i>x + 2</i>&nbsp;= 1,&nbsp;<i>x = -1</i>
    <i>x - 2</i>&nbsp;= -1,&nbsp;<i>x = 1</i>
  • What is an equation?
    An expression
    A numerical sentence
    Two expressions that are equal.
    Variables with operations
  • Which equation should you write to solve this problem?
    16
    2x+8=40
    40-x=8
    2x-8=40
  • Solve.
    25
    21
    23
    22
  • Which equation should you write to solve this problem?
    4x+5=25
    4(5) + x = 25
    5x+4=25
  • Solve this equation: &nbsp;&nbsp;x + 3 = 9
    6
    3
    12
    5
  • What is the first step in solving this equation.
    Subtracting 5
    Multiplying by 6
    Adding -1
    Adding 1
  • Solve the equation: -9x + 1= -80
    -11
    9
    10
    -9
  • The 2 pans of the scales are balanced. Find the value for the unknown mass B.
    5 g
    11 g
    47 g
    13 g
  • Solve.
    10
    16
    14
    12
  • A balance has 8g and 4g on the left, and 7g and an unknown ont he right. What is the unknown?
    11 g
    5 g
    2 g
    3 g
  • Solve.
    30
    50
    40
    26
  • What is the equation and solution&nbsp;for: "Five more than a number is 15"?
    5<i>x</i> = 15,&nbsp;<i>x</i> = 3
    <i>x</i> + 5 = 15, <i>x</i> = 10
    <i>x</i> + 5 = 15, <i>x</i> = 3
    5<i>x</i> = 15,&nbsp;<i>x</i> = 10
  • Solve this equation: -7 =&nbsp;x -2
    -9
    9
    5
    -5
  • Solve the equation.
    4
    0
    22
    16
  • What is the equation for the starting temperature of a&nbsp;temperature drop of 9°C&nbsp;to -3°C?
    <i>x&nbsp;</i>+ 3&nbsp;= 9,&nbsp;<i>x</i> = 6
    <i>x&nbsp;</i>- 3 = -9,&nbsp;<i>x</i> = -6
    <i>x&nbsp;</i>+ 9 = 3,&nbsp;<i>x</i> = -6
    <i>x&nbsp;</i>- 9 = -3,&nbsp;<i>x</i> = 6
  • Solve the equation: 9x - 7 = -7
    0
    -2
    1.6
    -1.6
  • Jona has pencils. Kris has three times as many. Together they have 24 pencils. Which is true?
    Krist has 12 pencils
    Kris has 18 pencils
    Jona has 3 pencils.
    Jona has 18 pencils.
  • Tim has $90 and spends&nbsp;$12.00 each week. Which equation calculates his spending over 3 weeks?
    A = (3 × 90) / 12
    A = 90 - 3 + 12
    A = 90 / (3 × 12)
    A = 90 - 3 × 12
  • Find the value of x that makes this equation true. &nbsp; 2x + 6 = 14
    10
    4
    7
    20
  • Identify the tiles that model 2x + 4.
    c
    a
    d
    b
  • Solve the equation.
    -4
    20
    -25
    -20
  • Which are true about the process of solving equations?
    Inverse operations are performed
    Addition is always used.
    The equation should stay balanced.
    The variable should be isolated.
  • What is the mass needed to balance the masses on this 2-pan balance?
    6 g
    10 g
    16 g
    11 g
  • Solve this equation: &nbsp;&nbsp;q ÷ 6 = 6
    12
    38
    36
    42
  • What is the answer to the equation&nbsp;x + 2 = 6
    3
    4
    8
    12
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