а)-5*(3а+1)-11=-16
– 15a – 5 – 11 = – 16
– 15a = – 16 + 11 + 5
a = 0
б)-3,2n+4,8=-2*(1,2n+2,4)
– 3.2n + 4.8 = – 2.4n – 4.8
– 3,2n + 2,4n = – 4,8 – 4,8
-0.8n = -9.6
n = 12
в)-5*(0,8z-1,2)=-z+7,2
– 4z + 6 = – z + 7.2
– 4z + z = 7,2 – 6
-3z = 1.2
z = -0.4
а)-5*(3а+1)-11=-16
– 15a – 5 – 11 = – 16
– 15a = – 16 + 11 + 5
a = 0
б)-3,2n+4,8=-2*(1,2n+2,4)
– 3.2n + 4.8 = – 2.4n – 4.8
– 3,2n + 2,4n = – 4,8 – 4,8
-0.8n = -9.6
n = 12
в)-5*(0,8z-1,2)=-z+7,2
– 4z + 6 = – z + 7.2
– 4z + z = 7,2 – 6
-3z = 1.2
z = -0.4