Question

题是:解下列方程 (1) 13.2x+9x=33.3 (2) 8x-3x=105

Answer 1

(1) 13.2x+9x=33.3

22.2x=33.3

x=1.5

(2) 8x-3x=105

5x=105

x=21

(3）5.4x+x=12.8

6.4x=12.8

x=2

(5) x-0.36x=16

0.64x=16

x=25