3.2x+1.8x=7.8

3.2x+1.8x=7.8 7.8－3.2x＝1.8x. 7.2x-3.2x-7.8=12. 3.2x-1.8x=24 （X+X)+(X-X)+(X*X)+(X/X)=100 1.8x-x=2.4x=？ 40%x+70%x-x=1.8 X-35%X=7.8 X+160%X=39 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+3x-1.8=x x=? 7.8X-X=14. x+180%x=3.2 x-0.36x=3.2 1.8x-x=17. 1.8x-2.4=x 1.8X-X=2.4 1.8x-7.2=x X+20%X=1.8