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Cooper B.
Answers (1)
Looks good (x+13) + (2x+23) = 90 What I do first may be different from what other people do first but what I do first is combine like terms 3x+36. 90-36=54. Then, 3x/3 54/3 x=18. Then take the original equation (x+13) + (2x+23) = 90 and make the x's 18.
