问题
解答题
解方程.
6x+1.2×4=9.6
8x-x=12+2.7
5×(x+2.5)=35.
答案
(1)6x+1.2×4=9.6,
6x+4.8=9.6,
6x+4.8-4.8=9.6-4.8,
6x=4.8,
6x÷6=4.6÷6,
x=0.8;
(2)8x-x=12+2.7,
7x=14.7,
7x÷7=14.7÷7,
x=2.1;
(3)5×(x+2.5)=35,
5x+12.5=35,
5x+12.5-12.5=35-12.5,
5x=22.5,
5x÷5=22.5÷5,
x=4.5.