Question

Solve the equation for y. 4.2x-1.4y=2.1

Answer 1

Subtract 2.1 from both sides:

$4.2x-1.4y-2.1=0$

Add 1.4y to both sides:

$4.2x-2.1=1.4y$

Of course, we can rewrite this as

$1.4y=4.2x-2.1$

Divide both sides by 1.4

$y = \dfrac{4.2}{1.4}x - \dfrac{2.1}{1.4} = 3x - 1.5$