Answer:
4,0
Step-by-step explanation:
Let the variable n represent the number

- Less eleven means subtract eleven from the variable

<u>➪</u><em>Thus, The equation is (n-11)</em>
2c + b = 37 ....multiply by -3
4c + 3b = 81
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-6c - 3b = - 111 (result of multiplying by -3)
4c + 3b = 81
------------------add
-2c = - 30
c = -30/-2
c = 15 <== $ 15 for a can of paint
and it costs $ 7 for each brush
Assuming that the arrows pointing up is multiplication that answer would be 780mn