2/3x+1/3x=-1 - solution

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Solution for 2/3x+1/3x=-1 equation:

x in (-oo:+oo)

(2/3)*x+(1/3)*x = -1 // + 1

(2/3)*x+(1/3)*x+1 = 0

x+1 = 0 // - 1

x = -1

x = -1

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