Question

Whitney has 13 blue envelopes. She has 11 fewer yellow envelopes than blue envelopes. She has 3 times as many green envelopes as yellow envelopes. How many envelopes does Whitney have in all?

Answer 1

Number of yellow envelopes is 13-11 =2
Blue is 13
Green is 2*3 =6 so add the totals
2+6+13 which is 21