3.2x+0.8x=28.8,

3.2x+0.8x=28.8, 3.2X十0.8X=28.8 X+0.8X=? 4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2）除2=71 （X+X)+(X-X)+(X*X)+(X/X)=100 x-0.8x=16 x=? 0.8x=x-30 x= x-0.8x=0.4x=? X-0.8X=6 X=? x-0.8x=0.8 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+0.5X=3 X-0.8X=8 x+180%x=3.2 x-0.36x=3.2 解方程 0.8X*(X+2)=X*X 解方程 0.8X*(X+2)=X*X x-0.8x=10 x-0.8x=22