问题
解答题
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答案
①18(x-2)=270
18(x-2)÷18=270÷18
x-2=15
x-2+2=15+2
x=17;
②12x=300-4x
12x+4x=300-4x+4x
16x=300
16x÷16=300÷16
x=18
.3 4
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①18(x-2)=270
18(x-2)÷18=270÷18
x-2=15
x-2+2=15+2
x=17;
②12x=300-4x
12x+4x=300-4x+4x
16x=300
16x÷16=300÷16
x=18
.3 4