40%x+(40%x-30)+120=x怎么解
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40%x+(40%x-30)+120=x怎么解40%x+(40%x-30)+120=x怎么解40%x+(40%x-30)+120=x怎么解0.4x+(0.4x-30)+120=x0.8x+90=x90
40%x+(40%x-30)+120=x怎么解
40%x+(40%x-30)+120=x怎么解
40%x+(40%x-30)+120=x怎么解
0.4x+(0.4x-30)+120=x
0.8x+90=x
90=0.2x
x=450
0.4x+0.4x-30+120=x
0.8x+90=x
x-0.8x=90
0.2x=90
x=450
0.4x+0.4x-30+120=x
0.8x+90=x
0.2x=90
x=450
原式→40%x+40%x-30+120=x→80%x+90=x→90=20%x→x=450
40%x+(40%x-30)+120=x怎么解
X/(x-30)=(x+40)/X解方程,
X-40%X=120
2×30x=40x+120
x-40%x=
60%x+25=40 x+30%x=52 19-120%x=7 4分之3x-5%x=17.5 x-10%x=18 (1-25%)x=36 2x+30%x=9.2
六题解方程:x+75%x=140 x-40%x=96 x-76%x=36 4x+50%x=90 60%x-30=120 x+50%x=45
(16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9)求x
x-40%x-40%x=15
x+40=2x x=?
X×X+(40-X)=58
X乘以X等于40 ---------------------X=?
10x+x*x=40
(x+40%x)×85%-x=95
(x+40%x)×85%-x=95
4x+x=40x
40%x+70%x-x=1.8
40%x+(40%x-10)=x-30怎么解