Question

solve the system of equations by substitution 8y-1=x and 3x=2y

Answer 1

plug the first equation in the second (since one variable is already isolated)

3(8y - 1) = 2y
24y - 2y = 3
22y = 3
y = 3/22

plug y in either equation, it should give the same answer (good way to check if you're right)

x = 8(3/22) - 1 = 1/11

solution to system equation is (x, y) = (1/11, 3/22)