62-(x+3)=45
36-(x+3)=45
(x+3)=36-45
(x+3)=(-9)
x =(-9)-3
x =(-12)
(TICK CHO MINH NHA ! )
62 - (x + 3) = 45
=> x + 3 = 62 - 45
=> x + 3 = -9
=> x = -9 - 3 = -12
62 - ( x + 3 ) = 45
=> 36 - ( x + 3 ) = 45
=> x + 3 = 36 - 45
=> x + 3 = -9
=> x = -9 - 3
=> x = -12
\(6^2-\left(x+3\right)=45\Leftrightarrow x+3=-9;x=-12\)