25 x X - 100 = 6 x X + 20
25 x X - 6 x X = 20 + 100
( 25 - 6 ) x X = 120
19 x X = 120
X = \(\frac{120}{19}\)
dễ
25 x X - 100 = 6 x X + 20
=>\(25X-100=6X+20\)
\(\Rightarrow25x-6x=100+20\)
\(\Rightarrow19x=120\)
\(\Rightarrow x=.........\)
25 x X - 100 = 6 x X + 20
25 x X - 6 x X = 20 + 100
( 25 - 6 ) x X = 120
19 x X = 120
X = \(\frac{120}{19}\)