Question

I need help with this ​

Answer 1

x= 100

Explanation:

the line would equal 180 in total so first subtract 57 then subtract 23 and you have x

180 - 57 = 123

123 - 23 = 100

x = 100

Answer 2

The two angles form a a straight line which is equal to 180 degrees:

Make an equation:

57 + (x +23) = 180

Simplify:

x + 80 = 180

Subtract 80 from both sides:

x = 100