2x - 16 = 5.6
移项:2x = 5.6 + 16
简化:2x = 21.6
除以2:x = 10.8
3.2x + 1.5×2 = 12.6
移项:3.2x = 12.6 - 3
简化:3.2x = 9.6
除以3.2:x = 3
5(x - 2.5) = 5.5
分配律:5x - 12.5 = 5.5
移项:5x = 5.5 + 12.5
简化:5x = 18
除以5:x = 3.6
2(x + x + 0.5) = 9.8
分配律:2x + 2x + 1 = 9.8
合并同类项:4x + 1 = 9.8
移项:4x = 9.8 - 1
简化:4x = 8.8
除以4:x = 2.2
x - 0.8x = 6
合并同类项:0.2x = 6
除以0.2:x = 30
12x - 8x = 4.8
合并同类项:4x = 4.8
除以4:x = 1.2
7.5 + 2x = 15
移项:2x = 15 - 7.5
简化:2x = 7.5
除以2:x = 3.75
1.2x = 81.6
除以1.2:x = 68
x + 5.6 = 9.4
移项:x = 9.4 - 5.6
简化:x = 3.8
91 ÷ x = 1.3
转换为乘法:91 = 1.3x
除以1.3:x = 70
这些题目涵盖了基本的解方程技巧,包括移项、合并同类项、分配律和除法。通过练习这些题目,学生可以更好地掌握解方程的方法。