(16x-10x+3x)*4=132
(17x-8x+3):7=12

(16x-10x+3x)*4=132

9x * 4 = 132

9x = 132 : 4

9x = 33

x = 33 : 9

x = 3 2/3

(17x-8x+3):7=12

9x + 3 = 12 * 7

9x + 3 = 84

9x = 84 - 3

9x = 81

x = 81 : 9

x = 9