5x-12=2*(1.5x+15)

1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550 x=4x=254 5x-x=180 3x+x=16 4x-2x=28 15x-11x=12.8 (12+12*1.5)x (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 (5X-15)-(2X+3)=X+12 已知x -2x=5,求代数式x四次方+3x³-12x² -31x-15 -3x+x/2=1.5*5-6 -6x+x=15-12 5x=-3 x=-0.6 能否写出中间的乘2 5x-12=2*(1.5x+15) 30X-2X=84 5.8X-X=60 6.6X-5X=8 4X-X=24 1.5X-X=1 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x 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 15X÷2=60 4X+X=3.15 3.4X+1.8=8.6 5X-X=2.4 1.5X-X=1 6.6X-6X=1.