I need 4 answers done, I need you to tell me how to do it, and show your work for the answers!

13)

14)

15)

16)

Step-by-step explanation:

13)

Sub in equation 1 into equation 2.

Expand the bracket.

Rearrange.

Solve for y.

14) (Following exactly the same steps)

15) (Following exactly the same steps again.)

16) (Still no variation on how the questions are asked, exact same method)

hello :

by applying the distributive property :

6 × 4.3 = 6 × ( 4 + 0.3 )

            =   (6 ×   4) + (6 ×   0.3)

            = 24 + 1.8

6 × 4.3 = 25.8