Question

2x - ( x - 3 ) = 1/2

Tim x.

Giup minh nha

Answer 1

\(2x-\left(x-3\right)=\frac{1}{2}\)

\(\Leftrightarrow2x-x+3=\frac{1}{2}\)

\(\Leftrightarrow2x-x=\frac{1}{2}-3\)

\(\Leftrightarrow x\left(2-1\right)=\frac{1}{2}-\frac{6}{2}\)

\(\Leftrightarrow x=\frac{-5}{2}\)

Answer 2

\(2x-\left(x-3\right)=\frac{1}{2}\)

\(\Leftrightarrow2x-x+3=\frac{1}{2}\)

\(\Leftrightarrow x=\frac{1}{2}-3\)

\(\Leftrightarrow x=\frac{1}{2}-\frac{6}{2}=-\frac{5}{2}\)

Answer 3

2x- x + 3 = 1/2

x = 1/2 - 3 

x=- 5 /2

Answer 4

\(2x-(x+3)=\frac{1}{2}\)

\(\Leftrightarrow2x-x-3=\frac{1}{2}\)

\(\Leftrightarrow2x-x=\frac{1}{2}+3\)

\(\Leftrightarrow2x-x=\frac{1}{2}+\frac{6}{2}\)

\(\Leftrightarrow1x=\frac{7}{2}\)

\(\Leftrightarrow x=\frac{7}{2}\)

Answer 5

2x - ( x-3) =1/2

2x-x+3=1/2

(2-1)x+3=1/2

1x+3=1/2

1x=1/2-3

1x=1/2-6/2

1x=-5/2

x= -5/2 :1

x=5-/2

Answer 6

\(2x-(x-3)=\frac{1}{2}\)

\(2x-x+3=\frac{1}{2}\)

\(2x-x=\frac{1}{2}-3\)

\(2x-x=-\frac{5}{2}\)

\(1x=-\frac{5}{2}\Leftrightarrow x=-\frac{5}{2}\)

Answer 7

\(2x-\left(x-3\right)=\frac{1}{2}\\ \Leftrightarrow2x-x+3=\frac{1}{2}\\ 2x-x=\frac{1}{2}-3\\x=\frac{-5}{2} \)

Answer 8

\(2x-\left(x-3\right)=\frac{1}{2}\)

\(\Leftrightarrow2x-x+3=\frac{1}{2}\)

\(\Leftrightarrow2x-x=\frac{1}{2}-3\)

\(\Leftrightarrow x\left(2-1\right)=\frac{1}{2}-\frac{6}{2}\)

\(\Leftrightarrow x=\frac{-5}{2}\)