Sorry for the crossing out. The answer and working out is below. Hope this helps!
Answer,
45/4 or 11.25 in decimal form
Explanation,
Step 1: Simplify both sides of the equation.
x + 3/4 = 12
Step 2: Subtract 3/4 from both sides.
x + 3/4 - 3/4 = 12 - 3/4 = 45/4
Hope this helps :-)
