(3/4)x = -2.1
x = -2.8
(1/2)x + (2/3)x = -14/3
x = -4
(2x+7)/5 = 58/25
x = 2.3
4- (5x+6)/3 = 11/3
x = -1
(7x+3) / 6 = (-8x+3) / -9
x = -3