解方程 必采 7.8x+2.4x=20.4 2(x+1)=6 6(x-1.5)=15 4x-1
(x-0.3x)*七分之十=375-x+0.3x
解方程 x-0.4x=0.3 3x+x+1.8=5 2(x+1)=
解下列方程: 1.2(x+3)=5x 2.4x+3(2x-3)=(x+4) 3.6(1/2x-4
0.8X=2.4 解0.8X÷()=2.4÷( ) X=
2(x-2.6)=8 5(x+1.5)=17.5 8(x-6.2)=41.6 (x-
30%x(1+20%)=x-(0.3x+0.36x-50) 解方程
计算:(2)(2x-1.5)/0.5-(3x-0.6)/0.2>(0.19-0.3x)/0.01
方程:13X+3=14X+2.4x+3=3x+8 5(x+2)=
(3x/x-1-x/x+1)×x²-1/x 其中x=根号2-2 先化简
1.5a+3[2b-3(a-b+2c)-(b+c)] 2.4x²-[2x-(x²-2x+3)-2(x
5.9x-2.4x=9 6.8x=27.2