21=x/1.75

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Solution for 21=x/1.75 equation: 


x in (-oo:+oo)

21 = x/1.75 // - x/1.75

21-(x/1.75) = 0

21-0.57142857*x = 0

21-0.57142857*x = 0 // - 21

-0.57142857*x = -21 // : -0.57142857

x = -21/(-0.57142857)

x = 36.75000009

x = 36.75000009

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