1,
2x + 5 = 19
2x = 19 - 5
2x = 14
x = 14 : 2
x = 7
2,
( 1 - 2x ) + 5 = 10
( 1 - 2x ) = 5
2x = 1 - 5
2x = -4
x = -4 : 2
x = -2
1) 2x + 5 = 19
2x = 19 - 5
2x = 14
x = 14 : 2
x= 7
2) (1-2x) + 5 = 10
(1- 2x) = 10 - 5
(1-2x) = 5
2x = 1-5
2x = -4
x= -4 : 2
x = -2
1) 2x +5 =19
2x =19-5
2x =14
x =14:2
x =7
2) (1-2x)+5=10
(1-2x) =10-5
(1-2x) =5
2x =1-5
2x =-4
x =(-4):2
x = -2
k mik nha
1) 2x + 5 = 19
2x = 19 - 5
2x = 14
x = 7.
Vậy x = 7
2)( 1 - 2x ) + 5 = 10
1 - 2x = 10 - 5
1 - 2x = 5
2x = 1 - 5
2x = -4
x = -2
Vậy x = -2
1) \(2x+5=19\)
\(2x=19-5\)
\(2x=14\)
\(x=14\div2\)
\(x=7\)
2) \(\left(1-2x\right)+5=10\)
\(1-2x=10-5\)
\(1-2x=5\)
\(2x=1-5\)
\(2x=-4\)
\(x=\left(-4\right)\div2\)
\(x=-2\)
1) \(x\)\(=\)\(7\)
\(x\)\(=\)\(-2\)
Chúc bn hok tốt !!!
1)2x+5=19
2x =19-5
2x =14
x =14:2
x =7
Vậy x=7
2)(1-2x)+5=10
1-2x =10-5
1-2x =5
2x =1-5
2x =-4
x =-4:2
x =-2
Vậy x=-2