Question

solve by the elimination method:
7x + 5y = -18
-7x + y = 30
What is the solution of the system?

Answer 1

again, always try to eliminate a variable first. as u can see, it's faster if u eliminate y out from the second eqn.

Answer 2

I can help you again

Answer 3

See

add both the euations

Answer 4

Ok. thanks

Answer 5

you will get

Answer 6

6y = -18 + 30
=> 6y = 12
=> y = 2

Thus substitute this value in first equation

Answer 7

7x + 5y = -18
=> 7x + 10 = -18
=> 7x = -28
=> x = -4

Thus , x = -4 and y = 2