Question 158346
5x - 12y = 207
5x - 11y = 206 subtract this equation
-----------------------
-y=1 answer
5x-12*-1=207
5x+12=207
5x=207-12
5x=195
x=195/5
x=39 answer.
proof:
5*39-11*-1=206
195+11=206
206=206