7(3a + 12) = 168 ← ( divide both sides by 7 )
3a + 12 = 24 ← ( subtract 12 from both sides )
3a = 12 ← ( divide both sides by 3 )
a = 4
OR
distribute the parenthesis by 7
21a + 84 = 168 ← ( subtract 84 from both sides )
21a = 84 ← ( divide both sides by 21 )
a = 4
Answer:
8, 133, 47, 43, 90 (remember to put degree symbols!)
Step-by-step explanation:
i added all of the work and explanations in this files! if you still have questions feel free to comment or message :)
Answer:
I think you answer is 85
Step-by-step explanation:
Answer: 360 your multiplying 40x9=360.
Step-by-step explanation:
If the cost of one DVD is $42.70, to find the price of two, multiply 42.70 by two. The price of two DVDs is $85.40.