The Awnser for the exact value is 7x + 3
He didn't do it as rise over run, or y2-y1/x2-x1
He did it reverse, which is incorrect.
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2(x + y) + 3(x + y)
first distribute:
(multiply 2 into everything in the first parenthesis, and 3 into everything in the second)
2x + 2y + 3x + 3y
Second simplify (add all like terms (adding in this case) )
(2x + 3x) + (2y +3y)
5x + 5y
your answer is: 5x + 5y
hope this helps
