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Use addition or substitution to find the value of x for this set of equations. top line x - y = 120 bpttom line x + y = 150

Use addition or substitution to find the value of x for this set of equations. top line x - y = 120 bpttom line x + y = 150

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1 Answer

Hi Amber,

x - y = 120       (-y +y=0)

x + y = 150

__________

2x= 270

x= 135

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