Homework Help: Math

Posted by Cassie on Wednesday, January 18, 2012 at 5:44pm.

Solving Equations with Grouping Symbols:

3(g-3)=6

Please explain how to do this

Rules:
Use Distributive Property
Combine like terms
Solve by using inverse operations

Math - Ms. Sue, Wednesday, January 18, 2012 at 5:47pm
3(g-3)=6

3g - 9 = 6

3g - 9 + 9 = 6 + 9

3g = 15

g = 15/3

g = 5
Math - Cassie, Wednesday, January 18, 2012 at 5:50pm
What about :
5(2c+7)=80
Math - Cassie, Wednesday, January 18, 2012 at 5:52pm
I don't understand it still
Math - Ms. Sue, Wednesday, January 18, 2012 at 6:11pm
5(2c+7)=80

Parentheses means multiply.

10c + 35 = 80

Get the knowns on one side -- so subtract 35 from each side.

10c + 35 - 35 = 80 - 35

10c = 45

Divide both sides by 10

c = 45/10

c = 4.5

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