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x in (-oo:+oo)
(-4/7)*x+2/9 = -418/63 // + -418/63
(-4/7)*x+2/9-(-418/63) = 0
(-4/7)*x+2/9+418/63 = 0
48/7-4/7*x = 0 // - 48/7
-4/7*x = -48/7 // : -4/7
x = -48/7/(-4/7)
x = 12
x = 12
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