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x in (-oo:+oo)
(-5/4)*(x+16)+(1/4)*x = -3 // + 3
(-5/4)*(x+16)+(1/4)*x+3 = 0
x/4-5/4*(x+16)+3 = 0
(-5/4*4*(x+16))/4+x/4+(3*4)/4 = 0
x-5/4*4*(x+16)+3*4 = 0
12-4*x-80 = 0
-4*x-68 = 0
(-4*x-68)/4 = 0
(-4*x-68)/4 = 0 // * 4
-4*x-68 = 0
-4*x-68 = 0 // + 68
-4*x = 68 // : -4
x = 68/(-4)
x = -17
x = -17
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