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2 answers:
Answer:
x=34
m∠S = 38
m∠T = 111
Step-by-step explanation:
Since the angles of a triangle should add up to 180, you can solve this equation:
31 + x+4 + 3x+9 = 180
the solution is x=34
Then the angles S and T can be found by substituting that value for x.
Answer:
Step-by-step explanation:
In a triangle, there are 180 degrees.
180- 31 = 149 degrees
(x + 4) + (3x+9) = 149
x=34
X+ 4 = 38
3x +9 =111
X =34, T=111, S=38
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