Your supposed to add the like terms and 7x and 6x are like terms so you add those and get 13x and 9 and 2 are like terms and when you add them you get 11 and the answer of the first part of the equation is 13x + 11
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7x + 2 + 6x + 9 = 12x + 5
13x + 11 = 12x + 5
13x - 12x = 5 - 11
x = -6
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Answer:
a triangle witih side lengths of 12,16,20
It’s D
Step-by-step explanation:
Because you have two sides that are congruent and an angle giving you SAS
