0.9x[x=1.5]=7.2

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0.9x[x=1.5]=7.20.9x[x=1.5]=7.20.9x[x=1.5]=7.2避免乘号和未知数x混淆,乘号写作*0.9*(x+1.5)=7.2x+1.5=7.2÷0.9x+1.5=8x=8

0.9x[x=1.5]=7.2
0.9x[x=1.5]=7.2

0.9x[x=1.5]=7.2
避免乘号和未知数 x 混淆,乘号写作 *
0.9 * ( x + 1.5) = 7.2
x + 1.5 = 7.2 ÷ 0.9
x + 1.5 = 8
x = 8 - 1.5
x = 6.5

0.9x[x=1.5]=7.2 0.9x[x=1.5]=7.2 x+ x+(x*50%)=1.5X? （X+X)+(X-X)+(X*X)+(X/X)=100 x*x*x*x*x=80000? 3x-x=0.9求x 1.5x-0.24=0.9x 1.5x=x-1.6＊x x+(x-1.4)+1.5x=33. 30/x=30/(x-1.5)-x 7x-x=7.2 x-20%x=7.2 7x-x=7.2 1.8x-7.2=x x-0.48x=7.2 x-0.8x=7.2 3X-X=0.9 x+0.9x=5.7