Answer:
x = 7.5
Step-by-step explanation:
Given
3(x + 4.5) = 36 ( divide both sides by 3 )
x + 4.5 = 12 ( subtract 4.5 from both sides )
Answer: 7.5
3x+13.5=36
3×=36-13.5
3×=22.5
×=7.5