Question

How do you solve `7+ 4y = 39`?

Answer 1

y=8

Explanation:

you'll want to get y by itself one one side of the equation, so subtract a 7 from both sides

`7+4y=39`
subtract 7 from both sides

=`4y=32`

divide both sides by 4 to isolate y

=`y=8`

Answer 2

`y=8`

Explanation:

We have to reverse the mapping to find out the answer

Minus 7 on both sides

`7-color(red)(7)+4y=39-color(red)7`

`4y=32`

Now divide both sides by 4

`4/color(red)4y=32/color(red)4`

`y=8`

Answer 3

`y=8`

Explanation:

In order to find `y`, we must first isolate the variable. Therefore, we subtract `7` from both sides.

`7-7=0 and 39-7=32`

Now, we're left with

`4y=32`

We still need to isolate the variable. Thus dividing by `4` on both sides;

`(4y)/4 = y and 32/4= 8`

So

`y=8`