x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
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x-20%x=44x-75%=0.25x÷四分之五=40%20%x+30%x=120x-20%x=44x-75%=0.25x÷四分之五=40%20%x+30%x=120x-20%x=44x-75%=0
x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
x-20%x=4
0.8x=4
x=4÷0.8
x=5
4x-75%=0.25
4x=0.25+75%
x=1÷4
x=0.25
x÷5/4=40%
x=40%×5/4
x=1/2
20%x+30%x=120
x=120÷0.5
x=240
x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
解方程4X-3(20-X)=6X-7(11-X)
x+4x=20
150.5x -4x +0.5x =7
x^-16/(x^+8x+16) +x/(x-4)
多项式x^4+2x^3-4x^2-2x+3与x^3+4x^2+x-6的最大公因式是什么x^4+2x^3-4x^2-2x+3=(x^4+3x^3)-x(x^2+4x+3)+(x+3)=x^3(x+3)-x(x+1)(x+3)+(x+3)=(x+3)[x^3-x(x+1)+1]=(x+3)[x^3+1-x(x+1)]=(x+3)[(x+1)(
下面有4道方程题↓↓x-20%x=4 4x-75%=0.25 x÷四分之五=40% 20%x+30%x=120
解方程x-0.25x=75 3.2x+0.5x=18.
x-﹙26-x﹚=﹙26-x﹚x÷4
x-1.8=4.6 4+0.2x=30 8x-2x=25.2
解方程:4x-2x+6=x(2x-4)+8
4x²-4x+1=x²-6x+9
X-0.75x=4求解
3×(x+1)+4x+8=4(x+1)+5x-7
4x-2=3x+1 -x+3=10 x-7=11-x x=四分之一x+6
解方程:(x+1)(x+2)(x+3)(x+4)-8=0.
x²-4x=8 (x+3)(x-2)=14
x²-4x=8 (x+3)(x-2)=14