Answer:
x = 20
Explanation:
the figure is a parallelogram, therefore the sum of angle A and angle B is 180°, we solve with an equation
180 = 5x + 5 + 4x - 5
180 = 9x
x = 180 : 9
x = 20
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check
180 = 5x + 5 + 4x - 5
180 = 5 × 20 + 5 + 4 × 20 - 5 (remember PEMDAS)
180 = 180
the answer is good