40%x+20%x=7.2

40%x+20%x=7.2 x-20%x=7.2 (X+X*20%)-[(1200-X)-(1200-X)*20%]=40% X+X*20%-(1200-X)-(1200-X)*20%=40% x+20%x =40 x+(x-20)=40 x+20%x=40 x-40%x= 解方程,亲们帮帮忙!2／3＋50％x＝1.6 x＝?x-40%x=0.96 x=?4/5x-1/2x=6.4 x=?80%x-0.6x=0.12 x=?1/2(x-80%)=0.6 x=?4(x+1/4)=16 x=?40%+20%x+7.2 x=?5/6(x-40%)=2 (16x-13)/(4x-3)-(20x-24)/(4x-5)=(32x-30)/(8x-7)-(40x-43)/(8x-9)求x 40%x+20%=7.2 x-20%x-40/20%x+40=3 20/(x-20)=(2x-40)/(x+40) 2x/40%=x+20x=? 2X+40%X=7.2 解方程:x+x+15=20+40+x 解方程：3x-20+4x=x+40 x-30%x-30%x-20=40 如何解,