(5x-12)÷5=7×(x+12)

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(5x-12)÷5=7×(x+12)
(5x-12)÷5=7×(x+12)

(5x-12)÷5=7×(x+12)
(5x-12)/5=7(x+12)
5x-12=35(x+12)
5x-12=35x+420
5x-35x=420+12
-30x=432
x=-14.4

(5x-12)÷5=7×(x+12) 两边乘5
(5x-12)=35×(x+12)
5x-12=35x+12*35
35x-5x=-12-12*35
30x=-12*36
x=-432/30
x=-72/5

解:
0.2(5x-12)=7(x+1)
x-2.5=7x+7
x=-14.4

(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2 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- 解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8 1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少 x-x/5=2.4 (求未知数x) 12÷5%x=8 4x+x=12.5 1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程 3x·x-5x-122x·x·x-x·x-4x+3x·x·x-6x-5x·x+6x+64x·x+12x+7 先化简,再求值:(1)(x+1/x²-x-x/x²-2x+1)÷1/x,x=根号2+1 (2)(1+x-3/x+3)÷2x/x²-9 x=根号3+3 (3)4-x/x-2÷(x+2-12/x-2)x=根号3-4 (4)x-3/2x-4÷(5/x-2-x-2) x=根号3-2 先化简,再求值【(1/X^2+3X+2)+(1/x^2+5X+6)+1/X^2+7X+12】÷(1/X^2+9X+20)其中x=根号2 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 3道简单的分式方程,1.3/(1-x^) = 2/(1+2x+x) - 5/1-2x+x^2.5x/(x^+x-6) + (2x-5)/(x^-x-12) = (7x-10)/(x^-6x+8)3.(x+1)/(x+2) + (x+6)/(x+7) = (x+2)/(x+3) + (x+5)/(x+6) (x-2)(x-3)+2(x-5)(x+6)-3(x^2-7x+12)其中x=-5/2 X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 (x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),其中x=三分之一,求值 求解2X*X-6X=5X-15在线等 还有是x*x-7x+12 (x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2)=0 (2x-1)²=9 x²-7x+6=0 x(x-1)=x 2x²-5x-12=0 2(x-1=(x-1)(x-2) 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 请问,这十道关于一元一次方程的题目我做对了吗?(1)2X+3X+4X=189X=18X=2(2)13X-15X+X=-3-1X=-3X=3(3)2.5X+10X-6X=15-21.56.5X=6.5X=1(4)4X+3(2X-3))=12-(X+4)4X+6X-9=12X-4810X-12X=-48+9-2X=-57X=28.5(5) 7X+2(3X-3)=207X+6X-6=2013X=20+6 (5x-12)÷5=7×(x+12)