Step-by-step explanation:
x + 9 + x = 25
2x + 9 = 25
2x = 25 - 9
2x = 16
x = 16/2
x = 8
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Verified answer
Step-by-step explanation:
x + 9 + x = 25
2x + 9 = 25
2x = 25 - 9
2x = 16
x = 16/2
x = 8