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e-lub [12.9K]
2 years ago
12

Solve for x. 3(x + 2) = 12 2 X = 4 3 1 x = 3 3 O x = 2 x = 6

Mathematics
1 answer:
vovikov84 [41]2 years ago
8 0

Answer:

1.3(x + 2) = 12

2.3x + 6 = 12

3.3x = 6

4.x=2

Step-by-step explanation:

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three zebras are chilling in the desert. suddenly a lion attacks. each zebra is sitting on a corner of an equally length triangl
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Jaquon made 252 calls in 36 days. What is the average number of calls he made in a day?
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Jon recently drove to visit his parents who live 280 miles away. On his way there his average speed was 9 miles per hour faster
Luba_88 [7]

Answer:

11 mph and 20 mph

Step-by-step explanation:

Represent his average speed going by r1 and his average speed returning by r2.  We know that r1 = r2 + 9.

Recall that distance = rate times time, so time = distance / rate.

Time spent going was (280 mi) / r1, or (280 mi) / (r2 + 9 mph).

Time spend returning was (280 mi) / r2.

The total time was 14 hrs, so (280 mi) / (r2 + 9 mph) + (280 mi) / r2 = 14 hrs

Note that there is only one variable here:  r2.  Find r2, and then from r2, find r1:

Dividing all 3 terms by 14 hrs yields:

  20            20

---------- + ----------- = 1

r2 + 9         r2

The LCD here is r2(r2 + 9).  Thus, we have:

      20r2                    (r2 +  9)(r2)

------------------- = 1 or  ------------------

 (r2 +  9)(r2)               (r2 +  9)(r2)

Then 20(r2) = (r2)^2 + 9(r2).  This is reducible by dividing all terms by r2:

20 = r2 + 9, or 11 = r2.  Then r1 = 11 + 9, or 20.

The two rates were 11 mph and 20 mph.

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3 years ago
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