Question

If angles (3x+21), (x+42) and (5x+18) are linear pair. then the value of x​

Answer 1

Answer:

x=11

Step-by-step explanation:

Sum of angles of Linear pair is 180

Hence,

$(3x + 21) + (x + 42) + (5x + 18) = 180 \\ 9x + 81 = 180 \\ 9x = 180 - 81 \\ x = \frac{99}{9} = 11$