Ellie ordered boxes of short envelopes and boxes of long
envelopes for her company.
• Each box of short envelopes contains exactly
80 envelopes.
• Each box of long envelopes contains exactly
50 envelopes.
• Ellie ordered 16 boxes of envelopes.
• The 16 boxes contained 1070 envelopes in all.
What is the total number of boxes of long envelopes that
Ellie ordered?
6
b
7
с
8
d
9