Question

2.If 5x - 60, 2x+40 and 3x -80 are the 3 angles of a triangle then find the value of x?

1) 28
2) 30
3) 32
4) none of these

Answer 1

Answer:

1) 28

Step-by-step explanation:

Sum of all angles of a triangle is 180 so

(5x-60)+(2x+40)+(3x-80)=180

10x-100=180

10x=280

X=28

Answer 2

Answer:

$5x - 60 + 2x + 40 + 3x - 80 = 180$

$10x - 100 = 180 \\ 10x = 180 + 100 \\ 10x = 280 \\ x = 280 \div 10 = 28$