nathanb126
30.10.2020 •
Mathematics
Solve for the variable 4a-9=7a+12
Thanks!!
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Ответ:
a = - 7
Step-by-step explanation:
Given
4a - 9 = 7a + 12 ( subtract 7a from both sides )
- 3a - 9 = 12 ( add 9 to both sides )
- 3a = 21 ( divide both sides by - 3 )
a = - 7
Ответ: