Twice the number of a certain whole number added to 3 time the number makes 90 find the number
2 answers
not sure what "the number of a whole number" is ...
maybe
2 n + 3 n = 90
5 n = 90
n = 90/5
n = 18
2 n + 3 n = 90
5 n = 90
n = 90/5
n = 18