Question

Please help I don’t understand how to do this!

Answer 1

since, angle RST= 90 degree

therefore, 90= 22 + 41 + 3x

90= 63 + 3x

90 = 3(21 + x)

30 = 21 + x

9 = x

Answer 2

We can solve this through algebra. So we know two of the angles already which means we can put them in the equation 22+41+3x=90

63+3x=90

Now that we have the equation above, we can solve this through basic algebra.

3x=27

divide both sides by three

x=9 is your answer