(12y+30)(1,4-0,7y)=0

Question

(12y+30)(1,4-0,7y)=0

Answer 1

(12y+30)*(1.4-0.7)=0
12y+30*0.7=0
12y=-21
Y=(-21):12=-1,9

Answer 2

(12y+30)(1,4-0,7y)=16,8y-8,4y+42-21y=8,6y-21y=42
-12,6y=42
-y=3.3
y=-3.3