\(4(a+3)=36\)
Delete the parentheses, multiplying with the number of outside, making the set of signals
\(4a + 12 = 36\)
Number with incognito are to the left of the equality and numbers without incognito are to the right, remembering that when changing of side changes the signal.
\(4a = 36 - 12\)
\(4a = 24\)
\(a = \frac{24}{4}\)
\(\boxed{a = 6}\)
Confirm that the solution is correct:
\(4(a+3)=36\)
\(4(6+3)=36\)
\(4(9)=36\)
\(36=36\) (TRUE)
Answer:
\(\boxed{a = 6}\)
