解一元一次方程计算题专练

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一元一次方程是指形如 ax + b = 0 的方程,其中 a 和 b 是常数,且 a ≠ 0。下面是一些一元一次方程的计算练习题:

1. 解方程:3x 7 = 2

解:3x = 2 + 7

3x = 9

x = 9 / 3

x = 3

2. 解方程:5x + 4 = 19

解:5x = 19 4

5x = 15

x = 15 / 5

x = 3

3. 解方程:2(x 3) = 8

解:2x 6 = 8

2x = 8 + 6

2x = 14

x = 14 / 2

x = 7

4. 解方程:4x 2 = 3x + 5

解:4x 3x = 5 + 2

x = 7

5. 解方程:-2x + 5 = 3x 1

解:-2x 3x = -1 5

-5x = -6

x = -6 / -5

x = 6 / 5

6. 解方程:7(x + 2) = 21

解:7x + 14 = 21

7x = 21 14

7x = 7

x = 7 / 7

x = 1

7. 解方程:0.5x 3 = 2.5

解:0.5x = 2.5 + 3

0.5x = 5.5

x = 5.5 / 0.5

x = 11

8. 解方程:x / 3 4 = 2

解:x / 3 = 2 + 4

x / 3 = 6

x = 6 3

x = 18

9. 解方程:2(x 4) = 3(x + 1)

解:2x 8 = 3x + 3

2x 3x = 3 + 8

-x = 11

x = -11

10. 解方程:5x 2 = 3(x + 2)

解:5x 2 = 3x + 6

5x 3x = 6 + 2

2x = 8

x = 8 / 2

x = 4

通过这些练习题,你可以熟悉一元一次方程的解法,并提高解题速度和准确性。记得在解题时,始终要确保等式两边的值保持相等。