Solve this equation by substitution?

7x+4y=25 2x+y=7
in Algebra 2 Answers by Level 1 User (800 points)

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1 Answer

line 1: 2x+y=7, or y=-2x+7... line 2: 7x+4y=25... line2...7x+4(-2x+7)=25... 7x-8x+28=25... -x=25-28=-3... x=+3... y=-2x+7=-6+7=+1
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