Question

calculate the value of x​

Answer 1

1.

therefore,

2x+3x= 180°

5x= 180

x=180/5=36

2.

4x+5x= 90°

9x=90°

x= 90/9=10°

3.

x+2x+3x+4x= 360

10x= 360°

x= 360/10= 36

4.

x+20°+65+3x-5=180°

x+3x+20+65-5=180

4x+80=180°

4x=180-80

4x=100

x=25