5(3а – 3) = 12 + 3(3а – 7)
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Answered by
3
Answer:15a - 15 = 15 (3a - 7)
15a - 15 = 45a - 105
15a - 45a = - 105 + 15
- 30a = -90
a = - 90 / - 30
a = 3
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Answered by
1
Answer:
15a - 15 = 12 + 9a - 21
-15 -12 +21= 9a - 15 a
-27 +21 = - 6a
- 6 = -6a
a=0
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