问题
解答题
解方程
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答案
(1)2(x+1.7)=9.2,
2(x+1.7)÷2=9.2÷2,
x+1.7-1.7=4.6-1.7,
x=2.9;
(2)1.2x÷2=60,
1.2x÷2×2=60×2,
1.2x=120,
1.2x÷1.2=120÷1.2,
x=100;
(3)2x-0.6×4=0.12,
2x-2.4+2.4=0.12+2.4,
2x=2.52,
2x÷2=2.52÷2,
x=1.26;
(4)16×0.5+3x=14,
8+3x-8=14-8,
3x=6,
3x÷3=6÷3,
x=2;
(5)7x+2.5x=3.8,
9.5x=3.8,
9.5x÷9.5=3.8÷9.5,
x=0.4;
(6)(3.8-2)x=14.4,
1.8x=14.4,
1.8x÷1.8=14.4÷1.8,
x=8.