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ololo11 [35]
3 years ago
15

Can someone help me with this?

Mathematics
1 answer:
algol133 years ago
8 0

Answer: x=12

Step-by-step explanation:

we know that sum of a triangle is 180 degrees

one angle is 90 degree

the sum will be 90+(2x+1)+(5x+5)=180

substract 90 from both sides

2x+1+5x+5=180-90

7x+6=90

7x=90-6

divide by 7

x=12

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