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Ronch [10]
3 years ago
15

The angles of a triangle are 128, 5x+10 and 9x. What is the value of x?

Mathematics
2 answers:
Advocard [28]3 years ago
5 0
Angles in a triangle total 180°

180=128+5x+10+9x
180-128-10=5x+9x
42=14x
x=3
Naddika [18.5K]3 years ago
3 0

Answer:

The value of x is 3.

Step-by-step explanation:

It is given that the angles of a triangle are 128, 5x+10 and 9x.

According to the angle sum property of a triangle, the sum of all interior angles of a triangle is 180 degrees.

128+5x+10+9x=180

138+14x=180

14x=180-138

14x=42

Divide both sides by 14.

x=3

Therefore the value of x is 3.

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