18x + 15 - y = 0
5y = 90x + 12
step by step and i'll mark you brainliest

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

add all the numbers and check the ones place.

the answer is 486. as the ones place is more than 4, the estimation will be the next 10 ie, 490

answer: the anser is 3

step-by-step explanation:

c- 2o is equal to 9