问题
解答题
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答案
(1)3x+2.16=4.2x,
3x+2.16-3x=4.2x-3x,
1.2x=2.16,
1.2x÷1.2=2.16÷1.2,
x=1.8;
(2)1.2(0.7+x)=4.8÷2,
1.2(0.7+x)=2.4,
1.2(0.7+x)÷1.2=2.4÷1.2,
0.7+x=2,
0.7+x-0.7=2-0.7,
x=1.3.
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(1)3x+2.16=4.2x,
3x+2.16-3x=4.2x-3x,
1.2x=2.16,
1.2x÷1.2=2.16÷1.2,
x=1.8;
(2)1.2(0.7+x)=4.8÷2,
1.2(0.7+x)=2.4,
1.2(0.7+x)÷1.2=2.4÷1.2,
0.7+x=2,
0.7+x-0.7=2-0.7,
x=1.3.