Question

7. the perimeter of a triangle is 80cm. write and simplify an equation to solve for x.
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Answer 1

X = 18

Explanation:

(x+3)+(x+3)+(3x-16) = 80

5x-10 = 80

5x = 80+10

5x = 90

x = 90/5

x = 18

hope that helped!