What is the question supposed to be?
21 because a triangle is always going to equal 180 so add those then subtract and it’s 21
Answer:
x=20
Step-by-step explanation:
10x-60=140
10x=140+60
10x=200
x=20
The unit normal for the given plane is <5,2,-1>.
The equation of the plane parallel to the given plane passing through (5,5,4) is therefore
5(x-5)+2(y-5)-1(z-4)=0
simplify =>
5x+2y-z=25+10-4=31
Answer: the plane through (5,5,4) parallel to 5x+2y-z=-6 is 5x+2y-z=31