1) 400:t-32=48;
400:t = 48 + 32;
400:t = 80;
t = 400/80 = 5;
2) 250+9*a=520;
9a = 520 - 250;
9a = 270;
a = 270/9;
a = 30;
1) 400:t-32=48;
400:t = 48 + 32;
400:t = 80;
t = 400/80 = 5;
2) 250+9*a=520;
9a = 520 - 250;
9a = 270;
a = 270/9;
a = 30;