(7X+70):(3X+70)= 7:4

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(7X+70):(3X+70)=7:4(7X+70):(3X+70)=7:4(7X+70):(3X+70)=7:4你好:(7X+70):(3X+70)=7:47(3X+70)=4(7X+70)21X+

(7X+70):(3X+70)= 7:4
(7X+70):(3X+70)= 7:4

(7X+70):(3X+70)= 7:4
你好:
(7X+70):(3X+70)= 7: 4
7(3X+70)=4(7X+70)
21X+490=28X+280
7X=210
X=30

4(7X+70)=7(3X+70)

(7X+70):(3X+70)= 7: 4
4(7x+70)=7*(3x+70)
x=30

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= 解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3) 谁能帮我解下列一元二次方程啊(4x+3)(5-X)=02X^2-4X-5=03x(x-1)=2-2xx(x+6)=7(x-1)^2+2x(x-1)=0-3x^2-4x+4=0(X-1)(X+2)=70(3-X)^2+X^2 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 解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x- 5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)求求大家帮个忙,怎么接着道方程啊! (1)2x^2-4x-5=0 (2)-3x²-4x+4=0 (3)3x(x-1)=2-2x (4)(x-1)(x+2)=70 (5)x(x+6(1)2x^2-4x-5=0(2)-3x²-4x+4=0(3)3x(x-1)=2-2x(4)(x-1)(x+2)=70(5)x(x+6)=7(6)(3-x)²+x²=9详细过程……………… 5x/(x+3)(x+2)+2x-5/(x-4)(x+3)=7x-70/(x+2)(x+4)yaoqiu方程结果, 60+2x=185 7x+22=43 16+8x=40 4x-54=14 0.5x-1.2×5=3.8 (x+3)÷2=10.5 6x+4×6=72 5x-16.5×3=25 x+4.8x=29 12.5x-0.9x=52.2 6x+9x-12x=2.37 8x-6=70 12x+48=132 4x+8x=14.4 5.8x-1.6x=12.6 3x+2x×12=42 6(2x-6)=12.6.... 问(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)(/是分数线) X是多少? 解下列方程(一元二次方程)(2)(x-1)∧2+2x(x-1)=0(3)2x∧2-4x-5=0(4)-3x∧2-4x+4=0(5)3x(x-1)=2-2x(6)(x-1)(x+2)=70(7)x(x+6)=7(8)(3-x)∧2+x∧2=9 (1)X-3/X-1+X²-2/(x-1)(X-7)=1+x-5/x-7 (2)2x-1/x+4-5=96/x²-16-1-3x/4-x (1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8(2) 已知x+3/(x-2)^2=A/x-2 + B/(x-2)^2 ,求A和B的值. 方程 3x(7-2x)+5x(2x-1)=4x(x-3)+56 解方程 x(2x-5)=4x-10 x+5x+7=3x+11 3X立方-【X立方+(6X平方-7X)】-2(X立方-3X平方-4X),其中X=-1 (1)6+2(x-3)=X (2)8-2(x-7)=x-(x-4) (3)2x-(1.5x-1)=2(1.5x-1) 先化简再求值3x³-[x³+(6x²-7x)]-2(x³-3x²-4x),其中x=-1