Juan solved the system of linear equations
8x - 3y = -1
and
-5x+2y = 1

a. First, he multiplied the equation
8x - 3y = -1
by 2 to get

b. Next, he multiplied the equation
-5x+2y = 1
by 3 to get

c. Then he added the two resulting equations together to get

d. Finally, he substituted the result into one of the original equations and solved