Question

Please solve question 4 b,c and d part

Answer 1

b) 2x+1+x+2=180

3x+3=180

3x=180-3

3x=177

x=177/3

x=59

c)2x+3x+4x+5x+x=180

15x=180

x=180/15

x=12

d)3x+10+2x-40=180

5x-30=180

5x=180+30

5x=210

x=210/5

x=42

note:here the sum of all angles is 180 hence all angles have been adde dupto 180 to find the value of x.

Answer 2

just add these angles and then equate with 180° (linear pair)

in (b)2x+1+x+2=180° now find value of x (c)x+2x+3x+4x=180° now find the value of x (d) 3x+10+2x-40=180° find the value of x