Answer:
The Antarctic Treaty created in 1991 decided to stop all exploitation of minerals, and thus has since banned mining in Antarctica. This is why minerals found in Antarctica have not been mined.
Step-by-step explanation:
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Hey there!
9x - 3 = 7(x + 3) + 2n
➡️ 9x - 3 = 7(x) + 7(3) + 2n
➡️ 9x - 3 = 7x + 21 + 2n
ADD -7x to BOTH SIDES
2n + 7x + 21 + (-7x) = 9x - 3 + (-7x)
SIMPLIFY IT!
2n + 21 = 2x - 3
ADD -21 to BOTH SIDES
2n + 21 + (-21) = 2x - 3 + (-21)
SIMPLIFY THIS AS WELL!
2n = 2x - 24
DIVIDE 2 to BOTH SIDES
2n/2 = (2x - 24)/2
FINALLY SIMPLIFY THIS LAST STEP!
n = x - 12
Answer: n = x - 12
Good luck on your assignment and enjoy your day!
~Amphitrite1040:)
Answer:
391 feet
Step-by-step explanation: