Question

If x+ 20 degree and 3x-40 degree make a straight angle then find the value of x

Answer 1

Answer:

The value of x is 50°

Step-by-step explanation:

given that (x+20) and (3x-40)

so (x+20)°+(3x-40)°=180°

(angle of straight line is 180°)

x+20°+3x-40°=180°

4x+20-40=180°

4x-20°=180°

4x=180°+20°

4x=200°

x=200°/4

x=50°

verification

at x=50°

(x+20)+(3x-40)=180

(50+20)+(3*50-40)=180

(70)+(150-40)=180

70+110=180

180=180

so verified