SOLUTION: three times the number of coconuts is 10 less than twice the number of pineapples. If there are 15 pieces of fruit in all how many are coconuts?

Question 120507: three times the number of coconuts is 10 less than twice the number of pineapples. If there are 15 pieces of fruit in all how many are coconuts?
Answer by MathLover1(20849) (Show Source): You can put this solution on YOUR website!
three times the number of coconuts is 10 less than twice the number of pineapples. If there are 15 pieces of fruit in all how many are coconuts?
let the number of coconuts be , and the number of pineapples be

given:
...............(1)
..............(2)

solve the system for to find how many are coconuts

..............solve for

..............plug into (1)

.........(1)...both sides multiply by

now find

...............(1).... substitue

check if:

..............(2)...substitue and

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