F (x) = 3x - 5, find f (7)
1 answer:
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Ok so first, let's combine the like terms on the right side by adding them
Now we look at them put back together
Now you have to move all your y's to one side and numbers without a variable to the other. So, for this we're going to add 6y to 7y on the right so the left side cancels out.
On the other side we subtract 6 from 19
and now to get the answer for y we divide 13 by 13 to get your answer of 1 :)