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x in (-oo:+oo)
(3*x+12)/10 = (2*x+22)/2 // - (2*x+22)/2
(3*x+12)/10-((2*x+22)/2) = 0
(3*x+12)/10+(-1*(2*x+22))/2 = 0
(2*(3*x+12))/(2*10)+(-1*10*(2*x+22))/(2*10) = 0
2*(3*x+12)-1*10*(2*x+22) = 0
-14*x-196 = 0
(-14*x-196)/(2*10) = 0
(-14*x-196)/(2*10) = 0 // * 2*10
-14*x-196 = 0
-14*x-196 = 0 // + 196
-14*x = 196 // : -14
x = 196/(-14)
x = -14
x = -14
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