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Balance Equations

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