Answer:
Step-by-step 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)
