Question

4.2x -1.4y = 2.1 solve for y

Answer 1

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

Answer 2

we have

`4.2x-1.4y=2.1`

Solve for y--------> clear the variable y

`4.2x-1.4y=2.1`

Subtract from both sides
`4.2x`

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

`-1.4y=2.1-4.2x`

Divide both sides by
`-1.4`

`y=(2.1-4.2x)/(-1.4)`

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

therefore

the answer is

`y=3x-1.5`

Answer 3

we have

`4.2x-1.4y=2.1`

Solve for y--------> clear the variable y

`4.2x-1.4y=2.1`

Subtract from both sides
`4.2x`

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

`-1.4y=2.1-4.2x`

Divide both sides by
`-1.4`

`y=(2.1-4.2x)/(-1.4)`

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

therefore

the answer is

`y=3x-1.5`