решите уравнения 21х+16х+55=166, 81у+60+9у=960, 59р-19р+125=565, 58d+37d+212=972

21x+16x+55=166
37x+55=166
37x=166-55
37x=111
x=111/37
x=3

2) 81y+60+9y=960
90y+60=960
90y=960-60
90y=900
y=900/90
y=10

3) 59p-19p+125=565
40p+125=565
40p=565-125
40p=440
p=440/40
p=11

4) 58d+37d+212=972
95d+212=972
95d=972-212
95d=760
d=760/95
d=8