Solve for x
x=19
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54=7+x+28
Subtract 24 from 78 to get 54.
54=35+x
Add 7 and 28 to get 35.
35+x=54
Swap sides so that all variable terms are on the left hand side.
x=54-35
Subtract 35 from both sides.
x=19
Subtract 35 from 54 to get 19.
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