How do you solve x-7y equals 18 2x-7y equals 22?

Answer 1

x - 7y = 18 ... (A)

2x - 7y = 22 ... (B)

Equation (B) - equation (A) gives

x = 4

Substituting this value of x in equation (A) gives

4 - 7y = 18

or 7y = -14 which gives y = -2

Solution: (x, y) = (4, -2)