Q: What is 3a plus 5b plus 7a?

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3a - 2b

3a - 2b

10a+7b undefined variables cannot be determined

-7a + 3a = -4a

3a + (3b - 2a) + 5b =3a + 3b - 2a + 5b =(3a - 2a) + (3b + 5b) =a + 8b

What is the solution of -2a plus 3a plus 5b

a + 3a - 2 + 3a. Add the a + 3a + 3a = 7a. You can't combine the -2 & 7a so the solution is: 7a - 2.

3a + 5b - 6a - 9b = -3a - 4b

It is an expression that can be simplified to: 3a-2b+c

4a + 3a = (4 + 3)a = 7a

Collect the terms in a, then the terms in b, getting 6a - 3a + 2b + 5b which simplifies to 3a + 7b. Gettit?

add like terms: 3a -2a -5b + 6b +3b - 7b = a -3b

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