Question

Use the substitution method to solve the following system of equations 8x + y = 10 6x + 5y = –1

Answer 1

The substitution method involves solving for a variable in terms of the other one.
8x+y=10
y=10-8x

Now you'd substitute this y-value into the second equation.
6x+5(10-8x)=-1

Do you follow?

Answer 2

I don't really follow. Can you elaborate more, please.

Answer 3

Next you'd solve for the x-value.
6x+50-40x=-1
-34x+50=-1
-34x=-51
x=-51/-34
x=1.5

Now you'd plug in this value into either equation (for x) and solve for y.