17x - 29 = 12x - (-42 )
17x - 12x = 29 - ( -42 )
5x = 29 + 42
5x = 71
x = 71 : 5
x = \(\frac{71}{5}\)
Ta có :
\(17x-28=12x-\left(-42\right)\)
\(\Leftrightarrow\)\(17x-12x=42+28\)
\(\Leftrightarrow\)\(5x=70\)
\(\Leftrightarrow\)\(x=14\)
Vậy \(x=14\)
Chúc bạn học tốt
17x - 28 = 12x - ( -42 )
17x - 12x = 28 - ( -42 )
5x = 70
x = 70 : 5
x = 14
Vậy x = 14
\(17x-28=12x-\left(-42\right)\)
\(17x-12x=42+28\)
\(5x=70\)
\(x=14\)
17x - 28 = 12x -(-42)
17x -28 = 12x +42
17x - 12x = 42 + 28
5x = 70
=> x = 70 : 5
x = 14
Vậy x = 14
17x-28=12x-(-42)
17x-28=12x+42
17x-12x=28+42
5x=70
x=70:5
x = 14
\(17x-28=12x-\left(-42\right)\)
\(17x-12x=42+28\)
\(5x=70\)
\(x=\frac{70}{5}\)
\(x=14\)
