(2x-27)×5.7 = 92.34解方程 60-7x = 9x+40解方程

(2x-27)×5.7 = 92.34解方程 60-7x = 9x+40解方程


(2x-27)×5.7 = 92.34
2x-27 =92.34÷5.7
2x-27=16.2
2x=16.2+27
2x=43.2
x=21.6
60-7x = 9x+40
7x+9x=60-40
16x=20
x=1.25



解方程8x-34=2x+10


8x-2x=10+34
6x=44
x=3/22



20=5-3/2x解方程


20=5-3/2x
20+3/2x=5
3/2x=5-20
3/2x=-15
x=-15×2/3
x=-10