help its telling me to find x and the measure of each angle

help its telling me to find x and the measure of each angle
Answer:
Step-by-step explanation:
the sum of the interior angles is 180°
180 : 2 = 5x + 4x
90 = 9x
x = 10
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check
5 * 10 + 4 * 10 = 90
the answer is good
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now we find the angles
5x + 4x = 90
5 * 10 = 50 °
4 * 10 = 40°
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check
50 + 40 = 90°
the answer is good