问题
解答题
解方程
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答案
(1)12X-9X=8.7,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(2)6X+18=48,
6X+18-18=48-18,
6x=30,
6x÷6=30÷6,
x=5;
(3)3(X+2.1)=10.5,
3(X+2.1)÷3=10.5÷3,
x+2.1=3.5,
x+2.1-2.1=3.5-2.1,
x=1.4.
解方程
|
(1)12X-9X=8.7,
3x=8.7,
3x÷3=8.7÷3,
x=2.9;
(2)6X+18=48,
6X+18-18=48-18,
6x=30,
6x÷6=30÷6,
x=5;
(3)3(X+2.1)=10.5,
3(X+2.1)÷3=10.5÷3,
x+2.1=3.5,
x+2.1-2.1=3.5-2.1,
x=1.4.