Jump to content
Rachel Maddiee

Geometry: Logic and Reasoning

Recommended Posts

1 hour ago, Rachel Maddiee said:

Solve -3(a+3) +5 (3-a) = -50


I can’t apply Properties of Equality.


Why not ?

I make a = 7

Edited by studiot

Share this post

Link to post
Share on other sites

First, you need to multiply what you have prior bracket with what is inside of bracket
e.g. -3(a+3) = -3*a-3*3 = -3a-9

then the same with second one,


then move the all numbers to the right side, changing signs


sum the all a on the left side


so you have finally


divide by -8 either side


ps. It's not geometry, but algebra. Linear equation with single unknown.



Edited by Sensei

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.