Question

chapater linear equations in one variable word problem
15Q​

Answer 1

Answer:

A= 3x

B=2x+20

C=5x-40

A+B+C=180 (by angle sum property)

3x+2x+20+5x-40=180

3x+2x+5x =180+40-20

10x=200

x=20

A=3x=3×20=60

B=2×20+20=60

C=5×20-40=60

Answer 2

Step-by-step explanation:

Given angles- 3x, 2x+20, 5x-40

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

3x + 2x+20 +5x-40=180

10x - 20 = 180

10x =180+20

10x =200

x =20

So x=20

So the angles are-

3*20=60

2*20+20=60

5*20-40=60

As all the angles are 60 degrees.

So the triangle is an equilateral triangle.