Answer:
y = 2
Step-by-step explanation:
Given
x + 5y - 10 = 0
x = 4y - 8
y ?
To get y , substitute 4y - 8 in place of x in the first equation.
That is
4y - 8 + 5y - 10 = 0
It can also be written as
4y + 5y - 8 - 10 = 0
9y -18 = 0
Add 18 to both sides of the equation.
We have 9y - 18 + 18 = 0 +18
9y = 18
Now divide both sides by 9 to get y. We’re dividing both sides by 9 because 9 is the value attached to the unknown y.
9y/9 = 18/9
y = 2
