(25%)x=4/5x-30
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(25%)x=4/5x-30
(25%)x=4/5x-30
(25%)x=4/5x-30
0.25x=0.8x-30
0.25x-0.8=30
-0.55x=30
x=-600/11
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(25%)x=4/5x-30
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
12—120%X=6 5分之3X—5%X=5.5 (1+25%)X=7.5 X—30%X=91 4%X+6%X=29.4 X+25%X=8.75
求几道因式分解!x^2+9x+20x^2-5x+6x^2+x-2x^2+x-2x^2+x-2x^2-3x-18-x^2+7x-12-x^2-x+62x^2-4x-30-5x^2+25x+120
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-16x=30x*x-7x-15 求x,可以只要答案.如图,全是正方形,一个边长为1,一个边长为4,求总面积,你也可以用你的方法.上面那个方程是我列的.5x*X+7X-72=0
x-2x+3x-4x+5x.+99x-100x=25求解
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
8x-16=32 x-8分之5x=32 7x-(6+3x)=30 4x+(5-3x)=1940%x+25%x=3908x-16=32 x-8分之5x=32 7x-(6+3x)=30 4x+(5-3x)=19 40%x+25%x=390
﹣(x²-5-4x)-x(x²+x-1),其中x=-1.先化简再求值
若(X十1/X)(X十1/X)=25/4,则(X一1/X)(X一1/X)的值为?
*-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X ||
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71
4x-5=25-9x+x 求x?
分式乘法!(5x+2)/(25-10x+x^2)乘以(x^2-25)/(25x^2-4)(2x-6)/(4-4x+x^2)乘以{(x-2)(x+3)}/(3-x)
(x+1)(x+2)(x+3)(x+4)+1(x+1)(x-2)(x+3)(x-4)+25
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
0.3+0.3x=0.39 x= 2x-1.5x=7.6x x= 0.36x÷0.3=1.2 x=6(x+1.2)=18.6 x= 7x+2x = 8.1 x= (x-5)÷3=1.7 x=5(x+1.1)=15.5 x= 9x+25=70 x= 7x-4x=2.1 x=
(x+2)(x的平方-2x+4)+(x-5)(x+5x^2+25)化简