0.3x-x乘以0.25=21.15-7x
0.3x-x乘以0.25=21.15-7x
解方程 (x+x+三分之一x)乘以3=308 0.3x+0.2乘以(160-x)=36 x+10=40%乘以(36-x+
解方程2乘以0.2x-3乘以0.3x+5乘以0.4x=0.3乘以5
7—0.5x=1.25x(乘以)6
7x+(35-x)乘以4=155解方程
3.14乘以X=16.56-X
0.04分之0.1X-0.3-X=0.4乘以(0.5X-3)求X
解方程 x+7x-5x+x=(15-5)乘以4
0.3x-x*0.25=21.15-7x
0.3x+7x-0.25x+=21.15
0.3x+7x-0.25x=21.15
(1+40%)乘以X乘以80%—X=15