Equations by substitution y=3x-7; 2x+4y=14

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asked Dec 23, 2018 79.6k views

1 Answer

Tiancheng Liu · Answer 1 · 2018-12-30T02:26:43+0000

Let's plug in y=3x-7 into 2x+4y=14
2x+4 (3x-7)=14
Distribute
2x+12x-28=14
Add
14x-28=14
Add 28 to both sides
14x=42
Divide
X=3
Y=3 (3)-7
Y=9-7
Y=2
(3,2) A the solution is (3,2)

Equations by substitution y=3x-7; 2x+4y=14

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