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(Unlimited Practice) SAT Math: Combining Like Terms

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What is the sum of $3xy+9x-9$ and $4x^2-7xy+5$ ?

$-4x^2+4xy-9x+14$

$4x^2-4x^2y^2+9x-4$

$4x^2-4xy+9x-14$

$4x^2-4xy+9x-4$

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Simplify $9(9x^2+3x-3)+ 9x-1$

$81x^2 +36x^2-28$

$81x^2 -36x-28$

$81x^2 -36x-28$

$81x^2 +36x-28$

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Simplify $-6(6x-10y)+ 10x-7$

$-26x -60y-7$

$42x +60y-7$

$-42x -60y+7$

$-26x +60y-7$

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What is the sum of $3xy+2x-9$ and $2x^2-7xy+2$ ?

$2x^2-4xy+2x-7$

$2x^2-4x^2y^2+2x-7$

$-2x^2+4x^2y^2-2x+7$

$2x^2-4xy+2x-11$

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What is the sum of $4xy+4x-6$ and $6x^2-10xy+4$ ?

$-6x^2+6x^2y^2-4x+2$

$-6x^2+6xy-4x+2$

$6x^2-6x^2y^2+4x-2$

$6x^2-6xy+4x-2$

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