2.12.X-3.X+X=50
(12-3+1).X=50
10 .X=50
X=50:10
X=5
1.13:X-3:X=2
(13-3):X=2
10 :X=2
X=10:2
X=5
1) 13 : x - 3 : x = 2
(13 - 3) : x = 2
10 : x = 2
x = 10 : 2
x = 5
2) 12.x - 3.x + x = 50
(12 - 3 + 1).x = 50
10.x = 50
x = 50 : 10
x = 5
1.\(\frac{13}{x}-\frac{3}{x}=2\Leftrightarrow\frac{10}{x}=2\Leftrightarrow x=5\)
2. 12x-3x+x=50 \(\Leftrightarrow\)10x=50\(\Leftrightarrow\)x=5
Bài 1 :
\(13:x-3:x=2\)
\(\left(13-3\right):x=2\)
\(10:x=2\)
\(x=10:2\)
\(x=5\)
Vậy \(x=5\)
Bài 2 :
\(12x-3x+x=50\)
\(12x-3x+1x=50\)
\(\left(12-3+1\right)\cdot x=50\)
\(10x=50\)
\(x=50:10\)
\(x=5\)
Vậy \(x=5\)