问题
解答题
解方程.
6x-7.8=10.92
5×2.5+5x=36.
答案
(1)6x-7.8=10.92,
6x-7.8+7.8=10.92+7.8,
6x=18.72,
6x÷6=18.72÷6,
x=3.12;
(2)5×2.5+5x=36,
12.5+5x=36,
12.5+5x-12.5=36-12.5,
5x=23.5,
5x÷5=23.5÷5,
x=4.7.
解方程.
6x-7.8=10.92
5×2.5+5x=36.
(1)6x-7.8=10.92,
6x-7.8+7.8=10.92+7.8,
6x=18.72,
6x÷6=18.72÷6,
x=3.12;
(2)5×2.5+5x=36,
12.5+5x=36,
12.5+5x-12.5=36-12.5,
5x=23.5,
5x÷5=23.5÷5,
x=4.7.