Question

4.2x - 1.4y = 2.1 solve for y

Answer 1

4.2x-1.4y=2.1
-4.2x -4.2x
____________
1.4y = -2.1x
(10) (10)
_____________
y= - 3x/2

Answer 2

we have

`4.2x-1.4y=2.1`

Solve for y------> that means isolate the variable y

Subtract
`4.2x` both sides

`4.2x-1.4y-4.2x=2.1-4.2x`

`-1.4y=2.1-4.2x`

Divide by
`-1.4` both sides

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

therefore

the answer is

`y=3x-1.5`