Question

3² ( x+4) - 5² = 5.2²

Answer 1

\(3^2\left(x+4\right)-5^2=5\cdot2^2\)

\(9\left(x+4\right)-25=20\)

\(9\left(x+4\right)=20+25\)

\(9\left(x+4\right)=45\)

\(x+4=45:9\)

\(x+4=5\)

\(x=5-4\)

\(x=1\)

Answer 2

= 9 ( x + 4 ) - 25 = 5 . 4

= 9 ( x + 4 ) - 25 =   20

= 9 ( x + 4 )       = 20 + 25

= 9 ( x + 4 )       =    45

        x + 4         = 45 : 9

        x + 4         =    5

        x               = 5 - 4

        x              =   1