Question

What is the value of x in the equation 1/2x - 2/3y=30 when y =15

Answer 1

x = 80

Step-by-step explanation:

First, plug the 15 into the y.

`1/2x - 2/3(15) = 30`

Use PEMDAS to solve the parentheses, 2/3 of 15 is 10.

`1/2x - 10 = 30`

Add 10 to both sides of the equation.

`1/2x = 40`

Divide each side by 1/2 (or multiply by it's reciprocal, which is 2)

That will get you your answer of x = 80

Answer 2

x=20

Explanation:

Substitute 15 for y

it will be 2/3 multiplied by 15 then you get 10

you add 10 to 30 getting 40

then you divide 40 by 1/2 getting 20

:)))