Remember to follow PEMDAS: (Parenthesis, Exponents, Multiply, Divide, Add, Subtract)
- Also follow the equality rule (what you do to one side you do to the other)
17) 4n - 8 = 5
4n - 8 (+8) = 5 (+8)
4n = 13
4n/4 = 13/4
n = 13/4 or 3.25
18) n/2 + 5 = 15
n/2+ 5 (-5) = 15 (-5)
n/2 = 10
n/2(2) = 10(2)
n = 20
19) 5v - 42 = 73
5v - 42 (+42) = 73 (+42)
5v = 115
5v/5 = 115/5
v = 23
20) 3d - 13 = 11
3d - 13 (+13) = 11 (+13)
3d = 24
3d/3 = 24/3
d = 8
hope this helps
