Question

x = 3y - 4
2x - y = 7
How I do I solve this using the substitution method?

Answer 1

take the 1st equation and substitiute it into the 2nd equation and you will have

2(3y - 4) - y = 7

distribute and you will have

6y - 8 - y = 7

or

5y - 8 = 7

solve for y


when you get y, substitute into either equation to get the value of x.