add or subract simplify if possible (4a+5b)/2 - (4a - 5b)/2

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add or subract simplify if possible (4a+5b)/2 - (4a - 5b)/2

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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Since they have a common denominator you "add/subtract" the tops and place that answer over the denominator " the 2". When you have a subtraction problem, you need to change the - to a + and change the sign of each term in the parentheses after the minus sign... so you have (4a+5b)/2 + (-4a + 5b)/2 I change the 4a to a -4a and the -5b to a +5b Then you add like terms... 4a - 4a = 0 (the a's are gone. 5b + 5b = 10b So you have 10b/2 = 5b
thanks a bunch :)

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