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Best Answer

3a + 11 = 7a - 13

subtract 3a from each side

3a - 3a + 11 = 7a - 3a - 13

11 = 4a - 13

add 13 to each side

11 + 13 = 4a - 13 + 13

24 = 4a

divide each sides integer by 4

24/4 = (4/4)a

6 = a

-------------check in original equation

3(6) + 11 = 7(6) - 13

18 + 11 = 42 - 13

29 = 29

----------------checks out

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Q: How do you solve 3a plus 11 equals 7a-13?
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