Eliminate the variable y: x - 2y = 3 -7x + 6y = -45
-4x = -36
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15
Eliminate one of the variables -4x + 12y = 13 4x - 3y = -13
9y = 0
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thief
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25
seesaw
Swap points!
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gift
Win 20 points!
Okay!
banana
Go to last place!
Oops!
10
Isolate y: 7x + y = 47
y = 47 - 7x or y = -7x + 47
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10
Solve for y: 16 + 5y = 31
y = 3
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15
Write as an equation: Sarah has 3 times as many dolls as Kristina. (Let s be the the number of dolls Sarah has and k be the number of dolls Kristina has.)
s = 3k
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eraser
Reset score!
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gold
Win 50 points!
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shark
Other team loses 20 points!
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thief
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10
Write as an equation: Nathan has 9 more cars than William. (Let n be the the number of cars Nathan has and w be the number of cars William has.)
n = w + 9
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20
Isolate y: 6x + 3y = 27
y = 9 - 2x or y = -2x +9
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15
Eliminate one of the variables. 7x - 5y = 40 8x + 5y = -31
15x = 9
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15
-4x + 5y = 35 If y = -1, what is x?
x = -10
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15
Write an equations: Joe has a lot of money in his pocket, all $20 and $50 bills. They are worth $500 all together. (Let t be the number of twenties and f be the number of fifties.))
20t + 50f = 500
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eraser
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seesaw
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fairy
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thief
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15
Write an equation: Jeremy has a bunch of coins in his pockets, all dimes and quarters. They are worth $2.70. (Let d be the number of dimes and q be the number of quarters.)
