Answer:
Both equations cancel each other out
Step-by-step explanation:
18x + 15 - y = 0
5y = 90x + 12
You want to use the substitution method for this system of equations because the y can easily be isolated in the first equation. Just add y to both sides so that the y variable is isolated. You will have y = 18x + 15. Substitute that equation into the second equation and solve for x. So you will have 5(18x + 15) = 90x + 12.
Use the Distributive Property to get rid of the parenthesis.
90x + 75 = 90x + 12. Subtract 90x from both sides. There is no value for x as the 90x's cancel each other out. And we all know that 75 does not equal 12
