Solve the system by elimination
2x+3y=4
5x+6y=7
I would double the first and get:
4x + 6y = 8
5x + 6y = 7
subtract them:
x = -1
sub back into one of the originals to get y
2x+3y=4
5x+6y=7
4x + 6y = 8
5x + 6y = 7
subtract them:
x = -1
sub back into one of the originals to get y