Alternating angles are = x = 21 degrees
or the sum of the angles in a triangle = 180
the other angle near A = 90 - 21 = 69o
then 69 + x + 90 = 180o
x + 159 = 180
x = 21 degrees
ohhh, I was a bit confused on what it meant by "write an equation"
That makes a lot more sense that 21=21 lol
x is an alternate interior angle, so it's the same as 21 degrees.
21 = 21
Hope this helped :))
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I appreciate it