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x in (-oo:+oo)
(-2/3)*(3*x+7) = 2 // - 2
(-2/3)*(3*x+7)-2 = 0
-2/3*(3*x+7)-2 = 0
-2/3*(3*x+7)-2 = 0
-2*x-20/3 = 0
-2*x-20/3 = 0
-2*x-20/3 = 0 // + 20/3
-2*x = 20/3 // : -2
x = 20/3/(-2)
x = -10/3
x = -10/3
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