120x=(120+30)×(x-14)用方程解,

X-X/12-X/7-X/8-X/4-X/20-X/5-30-120-300=50解方程 84x+576=120x+120x*30% X+120%X=44 30%X-18=54 求几道解方程数学题60%x+25=40 x+30%x=52 19-120%x=7 x-10%x=18 (1-25%)x=362x+30%x=9.260%x+90=102 x-20%=5.2 50%x+3x=28 9.1-14%x=0.7 40%x+(40%x-30)+120=x怎么解 x(120+x)*80％=x-76 x(x+1)(x-1)=120 x-x/4-120=x/2 0.5X+120+0.3X=X x/（120-x）=x/60 x/(120-x)=(60-x)/60 25%X+三分之一X+120=X 536-120%x-x=x-80 (30+x)÷(120+x)=30% x^2+14x-120=0 120%x-30%x=1.8, 2×30x=40x+120 120x=(120+30)×(x-14)用方程解,