\(=>x+7=13+25\\ =>x+7=38\\ =>x=38-7\\ =>x=31\)
\(\left(x+7\right)-25=13\\ \left(x+7\right)=13+25\\ \left(x+7\right)=35\\ x=35-7\\ x=28\)
( x + 7) -25 = 13
( x + 7) = 13 + 25
( x + 7) = 38
x = 38 - 7
x = 31
(x + 7) - 25 = 13
(x + 7) = 25 + 13
(x + 7) = 38
x = 38 - 7
x = 31