Answer:
x=-12
Step-by-step explanation:
Let the number be x
(x+8)(3/4)=-12
(3x+24)/4=-12
Multiply both sides by 4 in order to eliminate the denominator on the question side.
We have 4(3x+24)/4 = -12/4
On the question side, 4 crosses out 4
We are left with 3x+24=-12
To get the equation that can be used to find Ian's number, make x the subject of the formula
3x=-12-24
3x=-36
x=-36/3
x=-12