Answer:
We have been given the equation:

And x=10
Substitute the given x in the given equation we get:


On simplification we get:

Required solution is: x= 10 and y=-20
The solution to the system of equation is those points that satisfy the given system of equations.
B. 12 would be your answer
Answer: 66
Step-by-step explanation:see attachment.
If this helps you please rate brainest
Answer:
Step-by-step explanation:
D
Answer:
4) add 5x and 9x
answer: 14x - 30
7) subtract 28 from 15
answer: x - 13
Step-by-step explanation: sorry if it is wrong I try my best