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(-2/3)*(-8*x-7) = -4 // + 4
(-2/3)*(-8*x-7)+4 = 0
4-2/3*(-8*x-7) = 0
4-2/3*(-8*x-7) = 0
16/3*x+26/3 = 0
16/3*x+26/3 = 0
16/3*x+26/3 = 0 // - 26/3
16/3*x = -26/3 // : 16/3
x = -26/3/16/3
x = -13/8
x = -13/8
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