Question

36+42=6(6+□) What unknown number makes the equation true?

Answer 1

Let's assume that unknown number is x then :

78 = 6(6 + x)

13 = 6 + x

x = 7

Hence the unknown number is 7.

Answer 2

$\huge{\dag} \: {\underline{\boxed{\sf{\purple{ Answer }}}}}$

$\implies ㅤㅤ\mathsf{36 + 42 = 6(6 + \boxed{7})}$