For the first one:
2x + 2 = 3x - 52
2x + 2 + 52 = 3x - 52 + 52
2x + 54 = 3x
2x - 2x + 54 = 3x -2x
54 = x
For the second:
124 + 2x + 4 = 180
124 + 4 + 2x = 180
128 + 2x = 180
128 - 128 + 2x = 180 - 128
2x = 52
2x/2 = 52/2
x = 26
Answer:
3
Step-by-step explanation:

By the chain rule,

We have

and we're given that
changes at a constant rate of
thousand people per minute, which means

At the moment
thousand people are in the park, we have
, so we find

or approximately 2.324 thousand people per minute.
Answer:
75
Step-by-step explanation:
40 percent (calculated percentage %) of what number equals 30? Answer: 75.