\(58x-20x+x=78\)
\(\Leftrightarrow39x=78\)
\(\Leftrightarrow x=2\)
x(58-20+1)=78
x39=78
x=78:39=2
58 . x - 20 . x + x = 78
=> 58x - 20x + x = 78
=> 38x + x = 78
=>39x = 78
=> x = 78 : 39
=> x = 2
Bài 1 :
\(58.x-20.x+x=78\)
\(\left(58-20+1\right).x=78\)
\(39.x=78\)
\(x=78:39\)
\(x=2\)
Vậy x = 2 .
Học tốt
= 58 . x -20 .x + x . 1 = 78
= x. (58- 20 +1) = 78
= x. 39 = 78
= x = 78: 39
= x = 2
\(58x-20x+x=78\)
\(38x+x=78\)
\(39x=78\)
\(x=2\)
Bài làm :
Ta có :
\(58.x-20.x+x=78\)
\(\Leftrightarrow39.x=78\)
\(\Leftrightarrow x=2\)
Vậy x=2