I NEED THE ANSWER FAST PLEASE! The measures of the angles of a triangle are shown in thr figure below. Solve for x.

I NEED THE ANSWER FAST PLEASE The measures of the angles of a triangle are shown in thr figure below Solve for x class=
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Respuesta :

Answer:

4x + (5x+18) = 180-81=99

9x+18=99

9x=99-18=81

x=9

Step-by-step explanation: