Question

Express x in terms of y. Then find the value of x when y= 53 (x + 2y) = 2x + 5yX in terms of y:X=

Answer 1

Solve the equation for x, it means express x in terms of y

`\begin{gathered} 3(x+2y)=2x+5y \\ 3x+6y=2x+5y \\ 3x-2x=5y-6y \\ x=-y \end{gathered}`

Once found the expression of x in terms of y, replace for the given value of y to find x

`\begin{gathered} y=5 \\ x=-y \\ x=-5 \end{gathered}`