Question

||3х+5|+12|=20 решите пж

Answer 1

||3х+5|+12|=20
1)х>0
((3х+5)+12)=20
3х+5+12=29
3х=3
х=1
2)х<0
-((-(3х+5))+12)=20
-((-3х-5)+12)=20
-(-3х-5+12)=20
-(3х+7)=20
-3х-7=20
-3х=27
х=-9