Substitution of Variables

12 + n = ______________
n=4

• 18
• 20
• 16
• 12 + 4n

y - 6=__________
y=10

• 4
• 1
• 16
• 10

2(b) + 8= __________
b=2

• 12
• 10
• 16
• 8

(2²+ 5) + 2
What is the first step to solving this problem?
P
E
MD
AS

• Multiply
• Divide
• Exponents
• Parenthesis

2(c) + 5=_______________
c= 6

• 15
• 17
• 13
• 11

twice the sum of 2 and c

• 2 x 2 + c
• 2 + c
• 2(2 + c)
• (2 + c) 

100 divided by n

• n/100
• 100/n
• 100n
• n100

3(c) -11= ___________
c= 5

• -3
• 7
• 9
• 4

(c-10) + 8= ________
c= 10

• 8
• 0
• 2
• 4

a number decreased by 10

• 10-n
• 10/n
• n-10
• 10n