(23x+30)=(17x+30)=(14x+30)=(13x+30)=(10x+30)=(8x+30)=(7x+30)
(23x+30)=(17x+30)=(14x+30)=(13x+30)=(10x+30)=(8x+30)=(7x+30)
x-30%x=14x+25%x=20
X/(x-30)=(x+40)/X解方程,
(25/X)X(30/X)= 15/X怎么算
x-60%x-25%x=25%x-30
x^2=(x+30)X(x-18)怎么解
x+0.5x=30
30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1
5x+2=-8 x=30 3x=5x-14 x
x/2+x/6+x/12+x/20+x/30+x/42=1
解一元一次方程 x/2+x/6+x/12+x/20+x/30+x/42=6
计算:(x+1)x=7 (x-1)(x+2)=30 (3-x)(3-x)+x=9