Answer:
1
Step-by-step explanation:
Because if you plug in any other number than that 1 number (the solution) it will make the equation false. So, there will only be 1 number that can make the equation true.
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-1
Answer: 165 secs
2 mins has 120 secs in it
120 + 45 = 165
(2x + 15)° = 180°
2x = 180 - 15
2x = 165
x = 165/2
x = 82.5
