Question

What is the value of x?

Answer 1

Answer:

here in triangle IHJ

angle I + angle H + angle J = 180°

2x+5+x-1+7x+6 = 180°

10x+10 =180°

so 10x = 170°

therefore x is 17°

Answer 2

Answer:

USING ANGLE SUM PROPERTY

( 2x +5 )° + ( 7x + 6 )° + ( x - 1 )° = 180°

10x + 10 = 180°

10x = 180° - 10°

x = 170/10

x = 17

putting the value of x=17 in the following equation ⬇

2x + 5 = 2 × 17 + 5 = 39

7x + 6 = 7 × 17 + 6 = 125

x - 1 = 17 - 1 = 16

verification ( note - this is optional )

39° + 125° + 16° = 180°