Question

Solve the systems of equation by substitution method.

2x+y=1
3x-y=4​

Answer 1

x=1, y=-1. (1, -1).

Explanation:

2x+y=1

3x-y=4

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y=3x-4

2x+3x-4=1

5x-4=1

5x=1+4

5x=5

x=5/5

x=1

y=3(1)-4=3-4=-1