Question

Can someone explain this to me?

Answer 1

The sum of both angles will be 180° because we know that if two angles are formed on a straight line their sum will be 180° forming a linear pair.

`\rule{300pt}{3pt}`

`5x + 2 + 12x - 4 = 180`

`17x - 2 = 180`

`17x = 180 + 2`

`17x = 182`

`x = 10 \: \sf \: (rounded \: off)`