Answered

Tell whether the given ordered pairs is the solution of the given system:
(5, 7)

7x + y = 42
-3x + y = -8

Sagot :

Mlcparra16viz
We just substitute,

7x + y = 42
7(5) + 7 ≟ 42
35 + 7 ≟ 42
42 = 42  TRUE

-3x + y = -8
-3(5) + 7 ≟ -8
-15 + 7 ≟ -8
-8 = -8  TRUE

Therefore it is the solution to the system.