问题
解答题
(1)8x=24
(2)x÷0.5=1.2
(3)6x-4x=20.2
(4)12(x+3.7)=144
(5)5x-3×11=42.
答案
(1)8x=24,
8x÷8=24÷8,
x=3;
(2)x÷0.5=1.2,
x÷0.5×0.5=1.2×0.5,
x=0.6;
(3)6x-4x=20.2,
2x=20.2,
2x÷2=20.2÷2,
x=10.1;
(4)12(x+3.7)=144,
12(x+3.7)÷12=144÷12,
x+3.7-3.7=12-3.7,
x=8.3;
(5)5x-3×11=42,
5x-33=42,
5x-33+33=42+33,
5x÷5=75÷5,
x=15.