a) 21x + 16x + 55 = 16637x + 55 = 16637x = 111x = 3
б) 81y + 60 + 9y = 96090y + 60 = 96090y = 900y = 10
в) 59p - 19p + 55 = 56540p + 55 = 56540p = 510p = 12.75
г) 58d + 37d + 212 = 97295d + 212 = 97295d = 760d = 8
a) 21x + 16x + 55 = 166
37x + 55 = 166
37x = 111
x = 3
б) 81y + 60 + 9y = 960
90y + 60 = 960
90y = 900
y = 10
в) 59p - 19p + 55 = 565
40p + 55 = 565
40p = 510
p = 12.75
г) 58d + 37d + 212 = 972
95d + 212 = 972
95d = 760
d = 8