问题
解答题
解方程.
(1)5x+16.2=53.8(2)2x-5×3.4=10.6.
答案
(1)5x+16.2=53.8
5 X+16.2-16.2=53.8-16.2,
5X=37.6,
5X÷5=37.6÷5,
X=7.52;
(2)2x-5×3.4=10.6,
2x-17=10.6,
2X-17+17=10.6+17,
2X=27.6,
2X÷2=27.6÷2,
X=13.8.
解方程.
(1)5x+16.2=53.8(2)2x-5×3.4=10.6.
(1)5x+16.2=53.8
5 X+16.2-16.2=53.8-16.2,
5X=37.6,
5X÷5=37.6÷5,
X=7.52;
(2)2x-5×3.4=10.6,
2x-17=10.6,
2X-17+17=10.6+17,
2X=27.6,
2X÷2=27.6÷2,
X=13.8.