720 : [ 41 - (2\(x\) - 5)] = 22.5
41 - (2\(x\) - 5) = 720 :110
2\(x\) - 5 = 41 - \(\dfrac{72}{11}\)
2\(x\) - 5 = \(\dfrac{379}{11}\)
2\(x\) = \(\dfrac{379}{11}\) + 5
2\(x\) = \(\dfrac{434}{11}\)
\(x\) = \(\dfrac{434}{11}\) : 2
\(x\) = \(\dfrac{217}{11}\)
15 - \(x\) = 7 - (-2)
15 - \(x\) = 7 + 2
15 - \(x\) = 9
\(x\) = 15 - 9
\(x\) = 6
[230 - (15 - 5\(x\))]. 3 = 390
230 - (15 - 5\(x\)) = 390 : 3
230 - 15 + 5\(x\) = 130
215 + 5\(x\) = 130
5\(x\) = 215 - 130
5\(x\) = -85
\(x\) = -85 : 5
\(x\) = - 17