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Mathematics 21 Online
OpenStudy (anonymous):

If the midpoint between (x, 7) and (10, 11) is (15, 9), find the value of x.

OpenStudy (anonymous):

20

OpenStudy (anonymous):

\[15=(x+10)/2\]

OpenStudy (anonymous):

First, multiply both sides by 2. Giving us: 30 = (x+10) Second, subtract 10 from both sides: Giving us: 20 = x Finally, 20.

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