If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
-4 = x/2-5 // - x/2-5
5-(x/2)-4 = 0
1-1/2*x = 0 // - 1
-1/2*x = -1 // : -1/2
x = -1/(-1/2)
x = 2
x = 2
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