Question

afla pe y din egalitatea :
[(y+540÷6)×7-100]÷4÷5=30​

Answer 1

[ ( y + 540 : 6 ) × 7 - 100 ] : 4 : 5 = 30

[ ( y + 90 ) × 7 - 100 ] : 4 : 5 = 30

[ ( y + 90 ) × 7 - 100 ] : 4 = 30 × 5

[ ( y + 90 ) × 7 - 100 ] : 4 = 150

( y + 90 ) × 7 - 100 = 150 × 4

( y + 90 ) × 7 - 100 = 600

( y + 90 ) × 7 = 600 + 100

( y + 90 ) × 7 = 700

y + 90 = 700 : 7

y + 90 = 100

y = 100 - 90

y = 10

Answer 2

[(Y + 540 ÷ 6) X 7 -100 ] ÷4 = 30 X 5 30 X 5 = 150

(Y + 90 ) × 7 -100 = 150 × 4 150 ×4 = 600

(Y + 90 ) ×7 = 600 + 100 600 + 100 = 700

Y + 90 = 700 ÷ 7 700÷7 = 7

y=100 - 90

y= 10