Question

How do you even solve these. I am beyond confused, please help

Find the slope of the line.
7x - 3y = 21

Answer 1

Slope =
`(7)/(3)`

Explanation:

Slope intercept form is Y= mx + b. So, you just need to get y by itself.

7x - 3y = 21

1) Subtract 7x

-7x + 7x - 3y = -7x + 21

-3y = -7x + 21

2) Divide by -3

-3y/-3 =
`(-7)/(-3) x + (21)/(-3)`

y =
`(7)/(3) x -7`

-7/-3 is the same as 7/3 because a negative divided or multiplied by a negative is a positive. so mine as well just put it as a positive fraction.

Slope =
`(7)/(3)`

Answer 2

-3y=-7x+21
y=7/3x+7
The slope of the line is 7/3