Answer:
(x,y)=(4,-3)
Step-by-step explanation:
2x- 4y = 20
x=4
Substitute the value of x
2*4-4y=20
Solve equation
y=-3
A possible solution is
(x,y)=(4,-3)
Check the solution
2*4-4*(-3)=20
4=4
Simplify
20=20
4=4
The ordered pair is the solution
Answer:
Y=20
Step-by-step explanation:
If x=4 then you could rewrite the equation as:
2(4)-4y=20
8-4y=20
With this equation (8-4y=20) you would have to divide 4y by 4 and 8 by 4 which allows you to rewrite the equation as:
2-y=20
and here we would do inverse operations which, since it's 2-y we would change that to +2 which cancels out the 2-y and because we did it to one side we do it to the other- changing the equation to:
y=22
Sorry this was such a sloppy explanation, it's very difficult to type a response instead of having a visual representation! Apologies, hope this was somewhat helpful. xx
Y=22
