Question

Помогите заранее сябы

Answer 1

(48:t+7)·6=90
48÷t+7=90÷6
48÷t+7=15
48÷t=15-7
48÷t=8
t=48÷8
t=6

100-(b*8-50)=30
b*8-50=100-30
b*8-50=70
b*8=70+50
b*8=120
b=120÷8
b=15

9600÷(540÷d-4)=600
540÷d-4=9600÷600
540÷d-4=16
540÷d=16+4
540÷d=20
d=540÷20
d=27