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x in (-oo:+oo)
(-6/7)*x+3/5 = 4*x+174/35 // - 4*x+174/35
(-6/7)*x-(4*x)+3/5-(174/35) = 0
(-6/7)*x-4*x+3/5-174/35 = 0
-34/7*x-153/35 = 0 // + 153/35
-34/7*x = 153/35 // : -34/7
x = 153/35/(-34/7)
x = -9/10
x = -9/10
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