Question

7x + 2y = 24
8x + 2 y = 30

Answer 1

Whats the question?

Explanation:

Answer 2

Explanation:

7x + 2y = 24 (multiply by -1)

8x + 2y = 30

----------------------

-7x - 2y = -24 (result of multiplying by -1)

8x + 2y = 30

---------------------- add

x = 6

now sub 6 in for x back into either of the original equations to find y

7x + 2y = 24

7(6) + 2y = 24

42 + 2y = 24

2y = 24 - 42

2y = - 18

y = -18/2

y = -9

now we check...

7x + 2y = 24 8x + 2y = 30

7(6) + 2(-9) = 24 8(6) + 2(-9) = 30

42 - 18 = 24 48 - 18 = 30

24 = 24 30 = 30

correct !!!

so x = 6 and y = -9 or (6,-9)