Question

7a - 4 = 3(a + 9) + 4a

Answer 1

Answer:

a = 7.75

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Working:
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7a - 4 = 3(a + 9) + 4a

7a - 4 = 3a + 27

7a - 4 = 3a + 27 (if you add a number to
+ 4 = 3a + 04 one side, you must add
the same number to the
7a = 3a + 31 other side)

7a = 3a + 31
-3a = -3a + 31

4a = 31
31 divided by 4 = a
a = 7.75