Answer:
x = 38
∠P = 26º
Step-by-step explanation:
The sum of the angle in a triangle is 180
x + (x + 78) + (x - 12) = 180
Combine like terms
3x + 66 = 180
Subtract 66 from both sides
3x = 114
Divide both sides by 3
-----------------------
∠P = x - 12
∠P = 38 - 12
(x+78)+(x-12)+x=180
3x+66=180
3x=114
x=38
P=26
-3
When putting the smaller number in front of the bigger number your answer will be negative. I hoped I helped :)
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