Rozwiąż równanie: 2z+5z-3=15z-60 2y-7y=-12-3 20+3z=-15z-46 -5(b-7y)=21-20y

2z+5z-3=15z-60 7z - 3 = 15z - 60 8z = 57 z = 57/8 = 7 i 1/8 2y-7y=-12-3 -5y = -15 y = 3 20+3z=-15z-46 18z = -66 z = -66/18 = 3 i 12/18 = 3 i 2/3 -5(b-7y)=21-20y -5b + 35y = 21 - 20y 55y = 21 + 5b y = (21+5b)/55