1/ 2^2. x - 3.5 = 5^2 - 2^4
4. x - 3 . 5 = 25 - 16
4. x - 3 = ( 25 - 5 ) - 16
4. x - 3 = 20 - 16
4. x - 3 = 4
x - 3 = 4 : 4
x - 3 = 1
x = 1 + 3
x = 4
=> x = 4
2/ 5. ( x + 112 ) = 84 215
x + 112 = 842 15 : 5
x + 112 = 16 843
x = 16 843 - 112
x = 16 731
=> x = 16 731
3/ 15 : ( x + 2 ) = ( 3^3 + 3 ) : 10
15 : ( x + 2 ) = ( 27 + 3 ) : 10
15 : ( x + 2 ) = 30 : 10
15 : ( x + 2 ) = 3
x + 2 = 15 : 3
x + 2 = 5
x = 5 - 2
x = 3
=> x = 3
4/ 240 : ( x - 5 ) = 2^2 . 5^2 - 20
240 : ( x - 5 ) = 4 . 25 - 20
240 : ( x - 5 ) = 100 - 20
240 : ( x - 5 ) = 80
x - 5 = 240 : 80
x - 5 = 3
x = 3 + 5
x = 8
=> x = 8
5/( x + 1 ) - 3 = 2^3 + ( 7^2 . 2 ) :14
( x + 1 ) - 3 = 8 + ( 49 . 2 ) : 14
( x + 1 ) - 3 = 8 + 98 : 14
( x + 1 ) - 3 = 8 + 7
( x + 1 ) - 3 = 15
x + 1 = 15 + 3
x + 1 = 18
x = 18 - 1
x = 17
=> x = 17
