Answer to Question #307020 in Algebra for Sanda

Question

How can I change the subject of the formula in 1.1 y=mx+q

1.2.1 m

1.2.2 q

1.2.3 x

Answer 1

1.2.1 $y=mx+q$

Subtracting q from both sides

$mx=y-q$

Dividing both sides by x

$m=\dfrac{y-q}{x}$

1.2.2 $y=mx+q$

Subtracting mx from both sides

$q=y-mx$

1.2.3 $y=mx+q$

Subtracting q from both sides

$mx=y−q$

Dividing both sides by m

$x=\dfrac{y-q}{m}$