-49-(-20)=x/7

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Solution for -49-(-20)=x/7 equation: 


x in (-oo:+oo)

20-49 = x/7 // - x/7

20-(x/7)-49 = 0

-1/7*x-29 = 0 // + 29

-1/7*x = 29 // : -1/7

x = 29/(-1/7)

x = -203

x = -203

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