\(\left(x-25\right):15=20\)
\(\Rightarrow x-25=20\cdot15\)
\(\Rightarrow x=300+25\)
\(\Rightarrow x=325\)
\(\left(100000-991\right):x=9\)
\(=99009:x=9\)
\(\Rightarrow x=99009:9\)
\(\Rightarrow x=11001\)
( x - 25 ):15 = 20
(100000 - 991): x = 9
(x−25):15=20
⇒x−25=20·15
⇒x=300+25
⇒x=325
(100000−991):x=9
=99009:x=9
⇒x=99009:9
⇒x=11001
a) (x-25):15=20
x-25=20*15
x-25=300
x =300+25
x =325
b) (100000-991):x=9
99009 :x=9
x=99009:9
x=11001