I don't think you guys understand that 2(9+3) is the exact same thing as 2 * (9+3)
There is no rule that says you would do implied first. Since there is no concrete rule then you just do it from left to right. So written like it is, the answer is 288.
http://mathforum.org/library/drmath/view/54341.html
A math phd spelling it out for you guys.
The way it is written you do things in the order they appear.
Quote:
As written, your expression
ax/by
should be evaluated left to right: a times x, divided by b, times y.
The multiplication is not done before the division, but both are done
in the order they appear. Your first solution is right.
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Therefore answer is 288.