Question

1) y+y+60=100 2) 250-(z+z)=200 3)98-z-y=?

Answer 1

Răspuns:

3)98-25-20=53

Explicație pas cu pas:

1)y+y+60=100; 2y+60=100;  y= $\frac{100-60}{2}$=20

2)250-(z+z)=200;  250-2z=200; z=$\frac{250-200}{2}$=25

3)y=20

  z=25