Question

x-7y=-42, x-3y=6 Solve using substitution method.​

Answer 1

x-7y=-42. e.q1

x-3y=6. e.q2

Subtracting e.q1 and e.q2

x-7y=-42

x-3y=6

(-)

________

4y=48

y=48/4

y=24

Put y=24 in e.q1

x-7y=-42

x-7×24=-42

x-168=-42

x=-42+168

x=126