Question

What is the value of x?



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x =

Answer 1

The interior angles of a triangle add up to 180.

So:

10x - 4 + 8x + 3 + 91 = 180
18x - 1 + 91 = 180
18x + 90 = 180
18x = 90
x = 5

So the value of x is 5

Hope this helps :)