8.544 is the sqare root with a remainder
6(2x-11)+15=3x+12 Given
12x-66+15=3x+12 Distribution
12x-51=3x+12 Combine like terms
12x=3x+63 addition
9x=63 subtraction
x=7 division
the value of x that makes the equation true is 7.
I believe the answer is 267
If each is worth $25 and it costs $10 then he is making $15 profit.
4000/15 is 266.6666667
So you would need 267