5x+12=8x—15
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
15x=23x-24 12+5x=3x-8 3(x-3)=9-(x+6)解 4+x=4x-17解
5x+12=8x—15
11x+0.5=15x-0.7 5x+12=8x+3
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
已知当x=—5时,a.x. x. x. x. x+b.x. x. x+cx+8的值是12,则当x=5时,它的值是多少?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10
解分式方程(5-2x)/(x^2-x-12)=5x/(x^2+x-6)+(10-7x)/(x^2-6x+8)得
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8