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

Question

9685 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-04-29T16:14:14

There is no way in which we solve for unique values of $x and y$ using just this one equation
But we can represent $x$ in terms of $y$ or vice versa

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

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

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

$x + 7 = 2y$

Dividing both sides by 2 will give us:

$(x+7)/2 = (cancel(2)y)/cancel(2)$

$y = (x+7)/2$ ( $y$ in terms of $x$ )

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