Question

need step by step answer,

spam=30 answer reported, ​

Answer 1

here is the answer of above question..

Answer 2

Step-by-step explanation:

$given \\ x = 3 \\ y = 7 \\ if \: x = 3z \: and \: y = 7z \\ x + y = 180 \: degrees \\ 10z = 180 \\ z = 180 \div 10 \\ z = 18 \\ x = 3 \times 18 = 54 \\ y = 7 \times 18 \\ y = 126 \\ \\ \\ x + y + z + a = 360degrees \\ 54 + 126 + 18 + a = 360 \\ 198 + a = 360 \\ a = 360 - 198 \\ a = 162 \\ hence \: a \: is \: 162 \: degrees$