Question

[(X-0.5)/0.015625*5/8+12]*50/128=0.125 求X的等式

Answer 1

1/0.015625=64
然后就化简（x-0.5）*64*5/8+12=40x-20+12=40x-8=8（5x-1）
然后继续括号外的
8（5x-1）*50/128=1/8
解x=26/125

Answer 2

[(X-0.5)/0.015625×5/8+12]×50/128=0.125
(X-0.5)/0.015625×5/8+12=0.125×128/50
（X-0.5）×5/（0.015625×8）+12=0.125×8×16/50
（X-0.5）×5/0.125024=16/50-12
X-0.5=（0.32-12）×0.12504/5
X=-0.29209344+0.5
X=0.20790656

Answer 3

[(X-0.5)/0.015625*5/8+12]*50/128=0.125
[(X-1/2)/(1/64)*(5/8)+12]*(25/64)=1/8
[(X-1/2)*(64)*(5/8)+12]*(25/64)=1/8
[(X-1/2)*(8)*(5)+12]*(25/64)=1/8
[(X-1/2)*40+12]*(25/64)=1/8
[40X-20+12]*(25/64)=1/8
[40X-8]*(25/64)=1/8
[5X-1]*(25/8)=1/8
[5X-1]=(1/8)*(8/25)
5X-1=1/25
5X=26/25
X=26/125