<PRE><B>Question 656022</B>
3x - y = 5........(i)
7x - 2y = 12......(ii)

To use the substitution method, you will have to solve for one of the variables. I chose to use equation (i) and solve for y.
3x - y + y = 5 + y
3x = 5 + y
3x - 5 = 5 - 5 + y
3x - 5 = y.........(iii)

Substitute equation (iii) into equation (ii)

7x - 2(3x-5) = 12
7x - 6x + 10 = 12
x + 10 - 10 = 12 - 10
x = 2

Substitute x = 2 into (iii)
3(2) - 5 = y
6 - 5 = y
y = 1

Solution (2,1)</PRE>