Linear equations

y = x+3

2x-y=4
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1 Answer

Linear equations
y = x+3
2x-y=4

y = x + 3
2x - y = 4

Substitute:

2x - y = 4
2x - (x + 3) = 4
2x - x - 3 = 4
x - 3 = 4
x = 7

y = x + 3
y = 7 + 3
y = 10

Check your answer.

2x - y = 4
2(7) - 10 = 4
14 - 10 = 4
4 = 4

Answer: x = 7, y = 10

by Level 11 User (78.4k points)

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