If it's not what You are looking for type in the equation solver your own equation and let us solve it.
j in (-oo:+oo)
j/2-1 = 2 // - 2
j/2-2-1 = 0
1/2*j-3 = 0 // + 3
1/2*j = 3 // : 1/2
j = 3/1/2
j = 6
j = 6
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