3 years ago

HELP ASAP PLEASE PLEASE ASAP 25 points

Mathematics

1 answer:

telo118 [61]3 years ago

8 0

60x + 25y = 355 / *(-2)

120x + 30y = 570

_______________

-120x - 50y = -710

120x + 30y = 570

_______________

-20y = -140

y = 7

x = (570 - 30*7)/120 = 360/120 = 3

The cost of one pack of ballpoint pens is 3$ and the cost of one pack of gel pens is 7$.

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