Răspuns :
a) 1/4 = x/8, facem produsul pe diagonala
4x = 8 => x = 8 : 4 = 2
b) 7x - 3/12 = 13/4, facem produsul pe diagonala
4(7x - 3) = 13 x 12 => 28x - 12 = 156 => 28x = 156 + 12 = 168
x = 168 : 28 = 6
4x = 8 => x = 8 : 4 = 2
b) 7x - 3/12 = 13/4, facem produsul pe diagonala
4(7x - 3) = 13 x 12 => 28x - 12 = 156 => 28x = 156 + 12 = 168
x = 168 : 28 = 6
a) 1/4=x/8 (ca sa aratam ca este echivalent inmultim in diagonala astfel il
4x=8 putem afla si pe x)
x=8/4
x=2
1/4=2/8 => 1/4=1/4
b) (7x-3)/12=13/4
4(7x-3)=12*13
28x-12=156
28x=156+12
28x=168
x=168/28
x=6
(7*6-3)/12=13/4
39/12=13/4 (am simplificat prin 3 )
13/4=13/4
/- inseamna supra
*- inseamna a inmulti
4x=8 putem afla si pe x)
x=8/4
x=2
1/4=2/8 => 1/4=1/4
b) (7x-3)/12=13/4
4(7x-3)=12*13
28x-12=156
28x=156+12
28x=168
x=168/28
x=6
(7*6-3)/12=13/4
39/12=13/4 (am simplificat prin 3 )
13/4=13/4
/- inseamna supra
*- inseamna a inmulti