Solution equation: 3.5 (X-5) + 0.5x = 4.25 (x is unknown)

3.5（X—5）+0.5X=4.25
3.5x-17.5+0.5x=4.25
3.5x+0.5x=4.25+17.5
4x=21.75
x=5.4375

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