Answer:
115 degrees
Step-by-step explanation:
We know that all the angles of a triangle add up to 180 degrees.
Therefore 7x+10+x+20+2x=180
Combine like terms
10x+30=180
Subtract 30 from both sides (subtraction property of equality)
10x=150
Divide both sides by 10 (division property of equality)
x=15
Now we can plug this into the largest angles equation.
7(15)+10
= 115 Degrees.
