The given linear system is:

The question is asking to solve using elimination. When eliminating, you can either eliminate x or y. In this system, y is much easier to eliminate. The y variable in both equations are 7y. To eliminate, one of them has to be negative, so multiply one of the equations by -1.
I will be multiplying the second equation by -1.

Rewrite the system:

Subtract:


Lastly, you need to leave the variable x alone. The variable is currently -6x or -6 times x. To remove it, you need to do the opposite of it, which is dividing by -6.


Now that you have the value of x, substitute it into one of the equations to find y. I will be substituting it into the first equation.

Open the parentheses and multiply:

Move 5 to the other side to leave the variable alone:

You will be subtracting since you're "removing" it by doing the opposite of it.

Lastly, divide both sides by 7 to leave y alone.



The answer is (1, 4).
Answer: $3.50
Step-by-step explanation:
2.50x0.40=1
2.50+1
$3.50
Answer:
160,000,000
Step-by-step explanation:
hello so this one is pretty simple ill give a quick walk through of what i did...
first i took 10x10x10 for 1,000 then X that by 8= 8,000
second we do 10x10x10x10 for 10,000 then X that by 2 for 20,000 then 20,00 X 8,000= 160,000,000
Answer:
3 and -3
Step-by-step explanation:
Answer:
c + 0.5b =700 and c + b =1,000 I think