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(-2/3)*(5*x+7)-((1/3)*(4*x+8)) = 0
(-2/3)*(5*x+7)+(-1/3)*(4*x+8) = 0
-2/3*(5*x+7)-1/3*(4*x+8) = 0
-2/3*(5*x+7)-1/3*(4*x+8) = 0
-14/3*x-22/3 = 0
-14/3*x-22/3 = 0
-14/3*x-22/3 = 0 // + 22/3
-14/3*x = 22/3 // : -14/3
x = 22/3/(-14/3)
x = -11/7
x = -11/7
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