解方程:X-0.12X=2.816

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解方程:X-0.12X=2.816解方程:X-0.12X=2.816解方程:X-0.12X=2.816x-0.12X=2.8160.88x=2.816x=2.816/0.88x=3.2X-0.12X=

解方程:X-0.12X=2.816
解方程:X-0.12X=2.816

解方程:X-0.12X=2.816
x-0.12X=2.816
0.88x=2.816
x=2.816/0.88
x=3.2

X-0.12X=2.816
0.88X=2.816
X=2.816÷0.88
X=3.2

0.88x=2.816
x=3.2

x (1-0.12)=2.816
x=2.816/0.88
x=3.2

X-0.12X=2.816
两边同乘以 1000 得
1000X-120X=2816
880X=2816
X=3.2

X(1-0.12)=2.816
0.88x=2.816
x=2.816/0.88
X=3.2

(1-0.12)X=2.816
X=2.816/0.88
X=3.2

x-0.12X=2.816 0.88x=2.816 x=2.816/0.88 x=3.2 x-0.接下来你自己算得数 解:x=2·816÷0·88