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x in (-oo:+oo)
(-3/7)*((2/3)*x-2) = -3/4 // + -3/4
(-3/7)*((2/3)*x-2)-(-3/4) = 0
(-3/7)*((2/3)*x-2)+3/4 = 0
3/4-3/7*(2/3*x-2) = 0
(-3/7*4*(2/3*x-2))/4+3/4 = 0
3-3/7*4*(2/3*x-2) = 0
45/7-8/7*x = 0
(45/7-8/7*x)/4 = 0
(45/7-8/7*x)/4 = 0 // * 4
45/7-8/7*x = 0
45/7-8/7*x = 0 // - 45/7
-8/7*x = -45/7 // : -8/7
x = -45/7/(-8/7)
x = 45/8
x = 45/8
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