x-0.7x=18

x-0.7x=18 (x+30)*(x-18)=x*x 1.6x+2x*0.7=18 （X+X)+(X-X)+(X*X)+(X/X)=100 x-0.7x=64.8求x 90-x=2x(18+x) x/(x^2+6x+18)=? x平方+x=18,求x x-0.7x等于18 x-0.7x=0.51 x-0.7x=1.02 x-0.7x=1. x-0.7x=0.24. x-0.6x=0.7 x-0.7=15x 8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2 x^2=(x+30)X(x-18)怎么解 10x+(6-x)+18=10(6-x)+x