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Sagot :
Answer:
7 trust me im a expert at math and give me brainliest please
Step-by-step explanation:
Answer:
x=7
Step-by-step explanation:
The square indicates the angle is a right angle which equals 90°
5x+18+4x+9=90°
5x+4x+18+9=90°
9x+27=90°
9x=90°-27°
9x=63°
Divide both sides by 9
x=7.
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