First we will do -3 times everything in the parenthesis.
-3 times -4n = 12n
-3 times 30 = -90
SO,
12n - 90 = -30
+90 +90
12n = 60
divide 12 on both sides;
n = 5
This is your answer,
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Answer:
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Ricardo 83$ Pedro 267$ Mike 89$
he has 4 presents left
9
Step-by-step explanation:
10+ -7
3
3 = 9/3
See below
the second one is correct
4 miles = 45 + 4 (.04) = 45.44
11 miles = 45 + 11(.04+ = 45.44
etc etc