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No. 289
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Okay so just to be explicit, do you mean what is written in my attached image? If this is the case, then what you want to do initially is follow the order of operations
(http://en.wikipedia.org/wiki/Order_of_operations#The_standard_order_of_operations)
to simplify the left hand side of your equation. And what the order of operations says to do here is evaluate the parentheses first, which yields: 7*8 - 1*66 = 3x. Still following the order of operations and because there are no exponents nor roots here, we move on to evaluating multiplication (no division), which yields: 56 - 66 = 3x. The next stage in the order of operations is addition and subtraction, so do that: -10 = 3x. Now the thing about equations is that whatever you do to (whatever is used to operates on) one side of an equation, you must also do to (must be used to operate on) the other side of the equation for the equation to still hold true. In this case, what you want to do is divide both sides of the equation by 3: -10/3 = x.
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