问题
解答题
解方程:
1-0.85x=0.15
1.6x-0.68x=0.184
1.2×5+5x=6.6.
答案
(1)1-0.85x=0.15,
1=0.15+0.85x,
1-0.15=0.15+0.85x-0.15,
0.85÷0.85=0.85x÷0.85,
x=1;
(2)1.6x-0.68x=0.184,
0.92x=0.184,
0.92x÷0.92=0.184÷0.92,
x=0.2;
(3)1.2×5+5x=6.6,
6+5x-6=6.6-6,
5x÷5=0.6÷5,
x=0.12.