30*x=45*(x-10)
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30*x=45*(x-10)30*x=45*(x-10)30*x=45*(x-10)30x=45x-45030x-45x=-450-15x=-450x=30
30*x=45*(x-10)
30*x=45*(x-10)
30*x=45*(x-10)
30x=45x-450
30x-45x=-450
-15x=-450
x=30
30*x=45*(x-10)
45X=(4-X)*30 X=1.6
(X-30)/X=45/100 求X
45x+10 =50X(x-1)
2x(56-X)-10=30+X
80%x+30-x=10%x
30/x=45/10+x
X×X-(X-10)(X-10)=30×30
30(x+5)=26x+10x(x+5)
x+2x+(x+10)=90,x=?
x+(x+20)+(x-10)+70+x=540 .
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
(x+x)+(x-x)+(x/x)=11.2
0.5X-30+1/3*[X-(0.5X-30)]+10+50=X
30(x-2)+(x-4)-[10(x-2)+x]=56 怎么解
(x+30)*(x-18)=x*x
30-3(3-X)=4X 3X+12*6=15X+12 4X-2(50-X)=20 12(X-13)=10(X+3) 100-X=3(20+X)
x-8/5x=15 5/1x+10/3x=120 20%x=30x-8/5x=15 5/1x+10/3x=120 20%x=30 (1-45%)x=4.95