SOLUTION: Thank you in advance for your assistance!!! Please show me how to solve the problem as well so that I can better understand what I am doing wrong! 4ax+12bx-7ay-21by

Question 523810: Thank you in advance for your assistance!!! Please show me how to solve the problem as well so that I can better understand what I am doing wrong!
4ax+12bx-7ay-21by
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
4ax+12bx-7ay-21by
but this is not an equation you solve, you can only factor it
Group it
(4ax + 12bx) - (7ay + 21by); the negative outside the bracket changes the sign inside
;
Factor out 4x and 7y
4x(a + 3b) - 7y(a + 3b)
:
factor out (a+3b)
(a + 3b)(4x - 7y)
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