Solve the system by the addition method.

B. There are infinitely many solutions.

Step-by-step explanation:

Multiply 1st eq by 2:

8x+2y=10.

We got same eq as second, which means there are are infinitely many solutions.

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5