# How do you solve the equation x - 2y =-7?

Apr 29, 2015
• There is no way in which we solve for unique values of $x \mathmr{and} y$ using just this one equation

• But we can represent $x$ in terms of $y$ or vice versa

Transposing $- 2 y$ to the right hand side would give us:

$x = 2 y - 7$ ($x$ in terms of $y$)

Now transposing 7 to the Left hand side would give us:

$x + 7 = 2 y$

Dividing both sides by 2 will give us:

$\frac{x + 7}{2} = \frac{\cancel{2} y}{\cancel{2}}$

$y = \frac{x + 7}{2}$ ($y$ in terms of $x$)