5x + 12 = 2x + 21

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(Right answer plz )

How long does it take natsumi to clean up after she is done? table: .area time30. 245. 2.7560. 3.5

The high temp today was 62°. when nighttime comes, the temp will drop 40°. by 4am the temp will drop an additional 40°. what is the temp at 4am?

Aculinary club earns $1360 from a dinner service. they sold 45 adult meals and 80 student meals. an adult meal costs twice as much as a student meal. what is the cost of an adult meal?