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
Answer:
x= 100
Step-by-step 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
