Question

Rozaolvati-mi ecuatiile:c=300-(5y-3x);56-28:(x+2)=54;(38+y)×3=168;28×(x+235)=6860;y-37=13​

Answer 1

Explicație pas cu pas:

c=300-(5y-3x)

28×(x+235)=6860

x+235=6860:28

x+235=245

x=245-235

x=10

y-37=13

y=37+13

y=50

c=300-(5×50-3×10)

c=300-(250-30)

c=300-220

c=80

d=56-28:(10+4)=54

d=56-28:14=54

d=56-2

d=54