Posted by **Anonymous** on Monday, February 4, 2008 at 10:47pm.

3a+30-12=75 how do you do this

- geometry -
**aj**, Monday, February 4, 2008 at 11:48pm
3a+30-12=75

you combine 30-12 and get:

3a+18=75

then you subtract 18 from both sides:

3a-18=75-18

and get:

3a=57

then divide both sides by 3

3a/3=57/3

a=19

So 'a' equals 19

- geometry -
**drwls**, Tuesday, February 5, 2008 at 1:45am
The previous answer is correct, but this subject is NOT geometry.

## Answer This Question

## Related Questions

- geometry - 1.in which geometry do lines no contain an infinite number of points...
- Chemistry - I just need some ideas of what to put for these on my homework ...
- Chemistry - I just need some ideas of what to put for these on my homework ...
- I need an answer--molecular/electron geometry - Can anyone help me out with the ...
- Molecular and Electron geometry - Can anyone help me out with the differences ...
- Molecular and Electron geometry - Can anyone help me out with the differences ...
- geometry - Geometry riddl How did they like the story about towel manufacturing...
- Geometry - For each property listed from plane Euclidean geometry, write a ...
- Geometry Letter Grammar?? - Hello I'm in Geometry Honors (I'm a freshman btw) ...
- geometry - Math - Plane Geometry. BC is a diameter of circle O, and radius OE is...

More Related Questions