Answer
$b=12,000$ $s=15,000$ $p=29,000$
Work Step by Step
We call the number of biomedical engineers b. We call the number of skin care specialists s, and the number of physician assistants p. This gives: $p=3b-7000$ $ s = 9000+.5b$ $p+s+b=56,000$ We now solve the system of equations. Substitute to find: $(3b-7000)+(9000+.5b)+b=56,000$ $b=12,000$ Plug this back into the other two equations to find: $s=15,000$ $p=29,000$
