Homework Help: PRE-ALGEBRA

Posted by Anonymous on Sunday, October 2, 2011 at 6:26pm.

Solve the equation.

3x + 7x =120
It will help if you explain it too. Thanks!

PRE-ALGEBRA - Ms. Sue, Sunday, October 2, 2011 at 6:27pm
3x + 7x =120

10x = 120

This means that 10 time some number is 120.

Divide both sides of the equation by 10.

x = 120/10

x = ?
PRE-ALGEBRA - bobpursley, Sunday, October 2, 2011 at 6:28pm
combine like terms

10x=120
divide both sides by 10
x= 12

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