Question

a)
400:t-32=48
б)
 250+9*a =520

Answer 1

a)  
400 : t - 32 = 48
400 : t = 48 + 32
400 : t = 80
t = 400 : 80
t = 5

б) 
250 + 9 * a = 520
9 * a = 520 - 250
9 * a = 270
a = 270 : 9
a = 30