If x - 12y = -210 and x - 6y = 90, then x =

Question

Algebra word problem

Answer 1

x - 12y = -210

x - 6y = 90 (multiply by 2 and subtract the first equation from the second one)

x - 12y = -210

2x - 12y =180 (2nd equation minus the first one)

x=180+210

x=390