Question

Complete the solution of the equation. Find the

value of y when x equals -12.
-6x - 3y = 57

Answer 1

Y=5

Explanation:

x = -12( given)

-6 X( -12) -3y = 57

72-3y = 57

-3y=57-72

-3y= -15

Y=-15/-3

Y=5

Answer 2

`y=5`

Explanation:

we have the expression:

`-6x - 3y = 57`

and we are told that
`x=-12`, so we must substitute this value in the previous equation and then clear for the variable y:

substituting x:

`-6(-12)-3y=57`

clearing for y:

`72-3y=57\\-3y=57-72\\-3y=-15\\y=(-15)/(-3)\\ y=5`

and we can corroborate this result by substituting the values in the original equation

`-6(-12)-3(5)=72-15=57`