题目内容
| 解方程 2(x+1.7)=9.2 | 8x-4x=0.64 | 2x-0.24=0.12 |
| 6.2x-x=416 | 7x+2.5x=3.8 | 3.8-2)x=14.4. |
(1)2(x+1.7)=9.2,
2(x+1.7)=9.2÷2,
x+1.7=4.6,
x+1.7-1.7=4.6-1.7
x=2.9;
(2)8x-4x=0.64,
4x=0.64,,
4x÷4=0.64÷4,
x=0.16;
(3)2x-0.24=0.12,
2x-0.24+0.24=0.24+0.12,
2x=0.36,
2x÷2=0.36÷2
x=0.18;
(4)6.2x-x=416,
5.2x=416,
5.2x÷5.2=416÷5.2,
x=80;
(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,
1.8 x÷1.8=14.4÷1.8,
x=8.
2(x+1.7)=9.2÷2,
x+1.7=4.6,
x+1.7-1.7=4.6-1.7
x=2.9;
(2)8x-4x=0.64,
4x=0.64,,
4x÷4=0.64÷4,
x=0.16;
(3)2x-0.24=0.12,
2x-0.24+0.24=0.24+0.12,
2x=0.36,
2x÷2=0.36÷2
x=0.18;
(4)6.2x-x=416,
5.2x=416,
5.2x÷5.2=416÷5.2,
x=80;
(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,
1.8 x÷1.8=14.4÷1.8,
x=8.
练习册系列答案
相关题目