问题
解答题
求未知数.
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答案
①219+x=578,
219+x-219=578-219,
x=359;
②X-283=140,
X-283+283=140+283,
x=423;
③x×36=396,
x×36÷36=396÷36,
x=11;
④551÷x=29,
551÷x×x=29×x,
29x=551,
29x÷29=551÷29,
x=19.
求未知数.
|
①219+x=578,
219+x-219=578-219,
x=359;
②X-283=140,
X-283+283=140+283,
x=423;
③x×36=396,
x×36÷36=396÷36,
x=11;
④551÷x=29,
551÷x×x=29×x,
29x=551,
29x÷29=551÷29,
x=19.