Guys... I need help how do I solve this simple equation ?

Find b if: (a+b)=(c+d)

6 posts
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Guys... I need help how do I solve this simple equation ?

Find b if: (a+b)=(c+d)

Find b if: (a+b)=(c+d)

- Catalin_a
**Posts:**2**Joined:**Fri Jan 25, 2013 5:55 pm

Catalin_a wrote:Guys... I need help how do I solve this simple equation ?

Find b if: (a+b)=(c+d)

The parentheses for the lefthand and right hand members are not needed since nothing else on either side interferes with communication or meaning.

a+b=c+d.

Add the additive inverse of a to both sides and you are done.

- jg.allinsymbols
**Posts:**71**Joined:**Sat Dec 29, 2012 2:42 am

Thank you for reply, but how can I add the additive inverse of a to both sides when a is only on one side.

Can some one please solve this, I will have more sense if I can see it solved.

Please excuse my english, I am not an english speaker.

Can some one please solve this, I will have more sense if I can see it solved.

Please excuse my english, I am not an english speaker.

- Catalin_a
**Posts:**2**Joined:**Fri Jan 25, 2013 5:55 pm

Catalin_a wrote:Thank you for reply, but how can I add the additive inverse of a to both sides when a is only on one side.

Can some one please solve this, I will have more sense if I can see it solved.

Please excuse my english, I am not an english speaker.

Surely, a is on one side but not the other. The number a and its additive inverse are different numbers. You want to add THE ADDITIVE INVERSE of a to BOTH SIDES of the equation so that you can eliminate a from one side and to maintain equality.

Essentially you want to subtract a from both sides. The idea is that a + -a = 0

- jg.allinsymbols
**Posts:**71**Joined:**Sat Dec 29, 2012 2:42 am

A + B = C + D

subtract A from both sides

B = C + D - A

Mark Karadimos

www.mathguide.com

subtract A from both sides

B = C + D - A

Mark Karadimos

www.mathguide.com

- karadimos
**Posts:**1**Joined:**Mon Jan 28, 2013 7:12 pm

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