4r/5-r/10=7/1

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Solution for 4r/5-r/10=7/1 equation: 


r in (-oo:+oo)

(4*r)/5-(r/10) = 7/1 // - 7/1

(4*r)/5-(r/10)-(7/1) = 0

(4*r)/5-(r/10)-7 = 0

7/10*r-7 = 0 // + 7

7/10*r = 7 // : 7/10

r = 7/7/10

r = 10

r = 10

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