add 3x+7y+x-3x-2y and-5x+2y, 9x-2y
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Step-by-step explanation:
3x + 7y + x - 3x - 2y
=3x+ x - 3x + 7y - 2y
=x + 5y
-5x + 9x + 2y - 2y
= 4x + y
then, x + 5y + 4x + y
= x + 4x + 5y + y
= 5x + 6y
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