уровнение -5*(3а+1)-11=-16                         -3,2п+4,8=-2*(1,2п+2,4)                                          -5*(0,8z-1,2)=-z+7,2

-15a-5-11=-16

-15a=0

a=0

 

 

 

 

–5*(3а+1)–11=–16
–15а–5–11=–16
–15а=–16+5+11
–15а=0
а=0:–15
а=0
–3.2п+4см.8=–2*(1.2п+2.4)
–3.2п+4.8=–2.4п–4.8
–3.2п+2.4п=–4.8–4.8
–0.8п=–9.6
П=–9.6:(–0.8)
П=–10.4
–5*(0.8z-1.2)=z+7.2
-4z+6.2=-z+7.2
-4z+z=7.2-6.2
-3z=1
z=-3