Question

Help pls. Find the value of x.

Answer 1

Answer: x = 15 degree

Explanation:

(x + 30) + 100 + (3x - 10) = 180 (straight angle)

x + 30 + 100 + 3x - 10 = 180
4x + 120 = 180
4x = 180 - 120
4x = 60
x = 60/4
x = 15 degree

Therefore, x = 15 degree

Answer 2

Answer:

$\boxed{ \bold{ \huge{ \boxed{ \sf{x = 15 °}}}}}$

Step-by-step explanation:

$\sf{x + 30 ° + 100 ° + 3x - 10 ° = 180 °}$

( Sum of angle in straight line )

Collect like terms

⇒$\sf{4x + 30 ° + 100 ° - 10 ° = 180 °}$

Calculate the sum or difference

⇒$\sf{4x + 120 ° = 180 °}$

Move 120 to right hand side hand change it's sign

⇒$\sf{4x = 180 ° - 120 °}$

Subtract 120 from 180

⇒$\sf{4x = 60 ° }$

Divide both sides of the equation by 4

⇒$\sf{ \frac{4x}{4} = \frac{60}{4} }$

Calculate

⇒$\sf{x = 15 °}$

Hope I helped!

Best regards!!