Friday

September 19, 2014

September 19, 2014

Posted by **Anon** on Monday, April 1, 2013 at 5:44pm.

6a + 9b = 135

- Algebra 8th grade -
**Henry**, Wednesday, April 3, 2013 at 3:08pmMultiply both sides of the 1st Eq by -6.

Multiply both sides of the 2nd Eq by 3.

Then add the Eqs.

-18a - 30b = -420

+18a + 27b = 405

-3b = -15

b = 5.

in the 1st Eq, replace b by 5:

3a + 5*5 = 70

3a = 70-25 = 45

a = 15

**Answer this Question**

**Related Questions**

8th grade Math - I'm actually in 7th grade, but I'm doing 8th grade pre-algebra...

8th Grade - Me and my friend are making our own 8th grade binder, you know like...

8th grade - im in advanced math so i do 8th grade math and i dont understand how...

what can i compare middle school to? - what can i compare middle school to? (use...

algebra - 8th Grade Algebra (AP) f(x)=-3x Model the rule with a table of values ...

8th Grade Algebra - 3m - 10 = 2(4m -5)

Algebra. - I'm in 8th grade, im in algebra, and this is my question: x=a+b+c...

algebra 8th grade - 20÷ 4 ? 3/4 ÷ (1/2) use this <> and =

8th grade math in pre-algebra - 6(2x+3)=42

8th grade algebra - -12x=14-5x please and thank you!