I need a 2 step equation that equals 15

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Two siblings get bags of Jelly Beans and start eating them at different speeds. After a while Maya has 3 times as many Jelly Beans as her brother Tommy. If Maya is given 20 more beans by a friend, she will have 7 times as many beans as Tommy.

A textbook store sold a combined total of 207 psychology and biology textbooks in a week. The number of biology textbooks sold was 59 less than the number of psychology textbooks sold. How many textbooks of each type were sold?

At a restaurant direction of kids meal so to adult meal sold was 5 to 4 if there were 20 meals sold kids meal so what is the combined amount of kids and adult male sold

The students are selling cookies at a school fair. sara is selling 3 chocolate chip cookies for $2.49.

A loan with a balance of $210,000 prior to the June 1 payment was figured with interest at 5% annually and monthly principal and interest payments of $1,575. There was a 1% pre-payment penalty.

A town has a population of 20000 and grows at 6% every year. What will be the population after 6 years to the nearest whole number

A bacteria culture begins with 8 bacteria which triple in size every week. How many bacteria exist in the culture after 4 weeks? 512 648 12,288 26,244

If you were to exttend your number line to reach from 0 to 2 there would be five fifths for every whole number lenghts

Jacob made 35% of his penalty kick attempts last season. He wants to design a simulation that can be used to estimate the probability that he will make his next penalty kick attempt this season.