1.5X = 375 1.5X+X = 375 X+2.5X = 140 250+y = 375 1.5X+X = 375 2.5X+X = 140 9+6x = 14 X+9x = 4+7 2x+9 = 17 8-4x = 6 6x
7x-9 = 8 X-56 = 1 8-7x = 1 X-30 = 12 6x-2 1 = 2 1 6x-3 = 6 9x = 18 4x- 18 = 13 5x+9 = 1 1 6-2X = 65438
6.7x-60.3 = 6.7 9+4x = 40 2x+8 = 16 16.9÷X = 0.3 X÷0.5 = 2.6 3-5x = 80 1.8-6x = 54 9+4x = 40 9.4x-0.4x = 16.2
12-4x = 20 12x+34x = 1 18x- 14x = 12 23 x-5× 14 = 14
12+34x = 56 22- 14x = 12 23x- 14x = 14x+ 14x = 65 14x+ 14 = 25
30x 12x- 14x = 1x-0.7x = 3.6 2x = 0.5