Answer:
X= (a- 7)/b - 2
Explanation:
When this kind of question arises , what we are expected to do is to make x the subject of formula.
Reason because we have up to three unknown in the equation including x.
So let's make x the subject of the formula.
a-7=b(x+2)
a - 7 = bx +2b
a -2b -7 = bx
a-7 -2b = bx
Dividing through by b
(a-7)/b - 2 = x
X= (a- 7)/b - 2