Question

In the formula, X+a = (X+b)/c, make X the subject

Answer 1

`\red{ \boxed{ X= (b - ac)/(c - 1) }}`

Explanation:

`X+a = (X+b)/(c) \\ \\ \implies \: c(X+a) = X+b\\ \\ \implies \: cX+ac= X+b \\ \\ \implies \: cX - X = b - ac \\ \\ \implies \: X(c - 1) = b - ac \\ \\ \implies \: \huge \purple{ \boxed{ X= (b - ac)/(c - 1) }}`