For which equation would x = 4 be a solution?

4 x + 7 = 23
4 x ÷ 8 = 8
8 - 5 x = 1
7 + 3 x = 18

Working on itts i’m going to need you to me as i go along 1-5

Ineed in figuring out this problem.

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?