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Solve the equations below and write the algebraic steps. The first one is done for you. 

4a = 20 
4n = 8 
5d = 45 
4a
÷ 4 =
20 ÷ 4
1a =
5
a = 5

n = 2

d = 9

9n = 18 
8a = 80 
6c = 30 
n = 2

a = 10

c = 5

5n = 35 
6n = 60 
3a = 15 
n = 7

n = 10

a = 5

2n = 14 
6d = 30 
9n = 18 
n = 7

d = 5

n = 2

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The various resources listed below are aligned to the same standard, (6EE02) taken from the CCSM (Common Core Standards For Mathematics) as the Expressions and equations Worksheet shown above.
Write, read, and evaluate expressions in which letters stand for numbers.
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Apply and extend previous understandings of arithmetic to algebraic expressions