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。