Упростите выражения
3*(x-5)+5*(x+1)+10
5*(z-1)-2(z+3)-3z
1,2*(2x-1)+3,5*(x-2)+10,2
2,5*(x-0,2)-5*(2x-0,4)+0,5x
1) 3х-15+5х+5+10=0
3х +5х=15-5-10
7х=0
х=-7
2) 5z-5-2z-6-3z=0
5z-2z-3z=5+6
z=11
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Answers & Comments
1) 3х-15+5х+5+10=0
3х +5х=15-5-10
7х=0
х=-7
2) 5z-5-2z-6-3z=0
5z-2z-3z=5+6
z=11
2)=5z-5-2z-6-3z=-11
3)=2,4х-1,2+3,5х-7+10,2=
=5,9х+2
4)=2,5х-0,4-10х+2+0,5х=
=-7х+1,4=1,4-7х