-20/21=-x-x-2/7

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Solution for -20/21=-x-x-2/7 equation: 


x in (-oo:+oo)

-20/21 = -x-x-(2/7) // + -x-x-(2/7)

x+x-20/21+2/7 = 0

2*x-2/3 = 0 // + 2/3

2*x = 2/3 // : 2

x = 2/3/2

x = 1/3

x = 1/3

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