Yeah I need some help with these two problems. Shouldn't be too hard. Whoever gives the correct answer first will get Brainliest.

Step-by-step explanation:
Use the area formula for rectangles in both questions.
[tex]area = l \times w[/tex]
16. 70 = 7(x + 4)
70 = 7x + 28
42 = 7x
x = 6
17. 55 = 5(3x - 1)
55 = 15x - 5
60 = 15x
x = 4