Question

Please help me with math! Im stuck :/

Answer 1

$\rm \dfrac12=\dfrac{a+b}{a-b}$

Let's multiply both sides by 2,

$\rm 1=2\dfrac{a+b}{a-b}$

and then multiply both sides by (a-b),

$\rm a-b=2(a+b)$

distribute the 2,

$\rm a-b=2a+2b$

add b to each side,
and subtract 2a from both sides,

$\rm a-2a=b+2b$
$\rm -a=3b$
$\rm a=-3b$

divide by b to find the ratio,

$\rm \dfrac{a}{b}=-3$

Hope that helps! :)