Question

解方程~~~~~~~~~~~~~~~详细解答

1。x/10 = (x+8)/12 - 0.1
2。x/6 + 3 = x/4.5 -1
3。x/(54+48) *(54-48) = 30
这些题答案我知道，我需要详细解答过程，谢谢诶~~~~~

Answer 1

1。x/10 = (x+8)/12 - 0.1
6x=5(x+8)-6
6x=5x+40-6
6x-5x=40-6
x=34

2。x/6 + 3 = x/4.5 -1
3x+54=4x-18
3x-4x=-18-54
-x=-72
x=72

3。x/(54+48) *(54-48) = 30
x=30*(54+48) *(54-48)
x=30*102*6
x=18360