Question

Solve for y 4.2x - 1.4y = 2.1

Answer 1

4.2x - 1.4y = 2.1
-1.4y = -4.2x + 2.1
y = (-4.2/-1.4)x + 2.1/-1.4
y = 3x - 1.5 <==

Answer 2

The value of y is:

`y=3x-1.5`

Explanation:

We are given a equation in terms of variable x and y as follows:

`4.2x-1.4y=2.1`

Now, we are asked to solve for y i.e. we are asked to find the value of y in terms of x and constant.

Now, we subtract 4.2x on both the sides of the equation to obtain:

`-1.4y=2.1-4.2x`

On dividing both side of the equation by (-1.4) we get:

`y=(2.1)/(-1.4)-(4.2x)/(-1.4)\\\\y=-1.5+3x\\\\i.e.\\\\y=3x-1.5`