Question

aflati termeni necunoscuti ai proportiilor : a) 5 supra x = 20 supra 7 ; b) x+1 supra 3 = 10 supra 9 si explicatimi calculul

Answer 1

a) 5/x = 20/7
x = 5 * 7/20
x = 35/20
x = 7/4
b) x + 1/3 = 10/9
x + 1 = 3 * 10/9
x + 1 = 30/9
9x + 9 = 30
9x = 30 - 9
x = 21/9
x = 7/3