Question

Find the value of 3x - 4 given that - 2x+1=3.Simplify your answer as much as possible.3x - 4 =ÍХ

Answer 1

to solve 3x-4 we need to know the value of x and we can do it from the equation 2x+1=3

then solve x to this equation

`\begin{gathered} 2x+1=3 \\ 2x=3-1 \\ 2x=2 \end{gathered}`

`\begin{gathered} 2x=2 \\ x=(2)/(2)=1 \end{gathered}`

then the value of x is 1 and we can replace on 3x-4 to have the solution

`\begin{gathered} 3x-4 \\ 3(1)-4 \\ 3-4 \\ -1 \end{gathered}`

the value of the expresion is -1