5(8-x)=17.5
5×8-5x=17.5
45-5x=17.5
5x=45-17.5
5x=27.5
x=27.5÷5
x=5.5
(x+7.3)=3.5
x+7.3=3.5
x=3.5-7.5
x=-4
1.4(x+3.2)=6.3
1.4x+1.4×3.2=6.3
1.4x+4.48=6.3
1.4x=6.3-4.48
1.4x=1.82
x=1.3
26x+8x=5.1
(26+8)x=5.1
34x=5.1
x=0.15
x-0.24x=22.8
(1-0.24)x=22.8
0.76x=22.8
x=30
4.8x-x=19
(4.8-1)x=19
3.8x=19
x=5
.够明白了吧...
浪费了我十分钟...