问题
解答题
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答案
①25X-1.4=5.6,
25X-1.4+1.4=5.6+1.4,
25X=7,
25X÷25=7÷25,
X=0.28;
②7.8X-4.8X=12,
3X=12,
3X÷3=12÷3,
X=4.
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①25X-1.4=5.6,
25X-1.4+1.4=5.6+1.4,
25X=7,
25X÷25=7÷25,
X=0.28;
②7.8X-4.8X=12,
3X=12,
3X÷3=12÷3,
X=4.