问题
解答题
解方程.
2.5X-1.4=5.6
7.8X-4.8X=12.
答案
(1)2.5X-1.4=5.6,
2.5X-1.4+1.4=5.6+1.4,
2.5x÷2.5=7÷2.5,
x=2.8;
(2)7.8X-4.8X=12,
3x÷3=12÷3,
x=4.
解方程.
2.5X-1.4=5.6
7.8X-4.8X=12.
(1)2.5X-1.4=5.6,
2.5X-1.4+1.4=5.6+1.4,
2.5x÷2.5=7÷2.5,
x=2.8;
(2)7.8X-4.8X=12,
3x÷3=12÷3,
x=4.