How many linear equations in x and y can be satisfied by x=1 and y=2

Infinitely many linear equations

Step-by-step explanation:

a + 2b + c = 0

x = 1 and y = 2

4+n=5

step-by-step explanation:

this is because the four is four hours and the n represents the 1 extra hour over the weekend.

b= i'm srry i don't know that one.

4+n=5 n=1 because if vernon plays 5 hours a week then 4+1=5 hours.

hope this : )