\(36-\left(x+3\right)=45\)
\(\Rightarrow x+3=36-45=-9\)
\(\Rightarrow x=-9-3=-12\)
6^2 - (x+3) = 45
36 -x-3 = 45
33-x = 45
x= -12
62 - ( x + 3 ) = 45
x + 3 = 62 - 45
x + 3 = -9
x = -9 - 3
x = -12
62 - ( x + 3 ) = 45
36 - ( x + 3 ) = 45
x + 3 = 36 - 45
x + 3 = -9
x = -9 - 3
x = -12
62 - ( x + 3 ) = 45
36-x-3=45
33-x=45
x=33-45
x=-12