问题
解答题
解方程
3.5X-X=3.25
8X-5×14=9.12
3.3×2.6-5X=2.3×2.6.
答案
(1)3.5X-X=3.25,
(3.5-1)X=3.25,
2.5X=3.25,
2.5X÷2.5=3.25÷2.5,
X=1.3;
(2)8X-5×14=9.12,
8X-60=9.12,
8X-60+60=9.12+60,
8X=69.12,
8X÷8=69.12÷8,
X=8.64;
(3)3.3×2.6-5X=2.3×2.6,
8.58-5X=5.98,
8.58-5X+5X=5.98+5X,
5.98+5X=8.58,
5.98+5X-5.98=8.58-5.98,
5X=2.6,
5X÷5=2.6÷5,
X=0.52.