Question

What is the value of y in the following system?
y = 3x - 5

6x + 3y = 15

Answer 1

x=2, y=1. (2, 1).

Explanation:

y=3x-5

6x+3y=15

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6x+3(3x-5)=15

6x+9x-15=15

15x-15=15

15x=15+15

15x=30

x=30/15

x=2

y=3(2)-5

y=6-5=1