Y=2x+9 y=4x-9 Solve the system of equations.
2 answers:
Answer:
x=9,y=27
Step-by-step explanation:
y=2x+9,........equation 1
y=4x-9..........equation 2
from equation 1 and 2
we get
2x+9=4x-9
9+9=4x-2x
x=18/2=9
substituting value of x in equation 1
y=2×9+9=18+9=27
Answer:
Your solution is (9, 27) or x = 9, y = 27
Step-by-step explanation:
y = 2x + 9
y = 4x - 9
We can see that both of these equations equal y, so we can set them equal to each other.
2x + 9 = 4x - 9
Add 9 to both sides.
2x + 18 = 4x
Subtract 2x from both sides.
18 = 2x
Divide both sides by 2.
9 = x
Now we want to find y. To do this, plug x = 9 back into one of the original equations.
y = 2(9) + 9
Multiply.
y = 18 + 9
Add.
y = 27
Your solution is (9, 27)
Check your answer by plugging x = 9 and y = 27 back into the original equations.
y = 2x + 9
27 = 2(9) + 9
27 = 18 + 9
27 = 27
y = 4x - 9
27 = 4(9) - 9
27 = 36 - 9
27 = 27
Your answer is correct.
Hope this helps!
You might be interested in
Answer:
6 hours
Step-by-step explanation:
( 7h + 5h)/2 =6h
Answer:
The answer for the first one is 1/2.
The answer for the second one is -1/1
Step-by-step explanation:
Hope that helps you :)
Answer: =248x
Step-by-step explanation: Hope this help :D
Let's simplify step-by-step.
4x(10)+2x(104)
=40x+208x
Combine Like Terms:
=40x+208x
=(40x+208x)
=248x
Answer:
y = 2x
Step-by-step explanation: