Question

aflati a si b daca a supra b = 3 supra 7 si 2a+5b= 82. ajutorrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr vreau rasp cat mai repede.................. plzzzzzzzzzzzzzzz

Answer 1

A/b=3/7, imnultim pe diagonala si obtinem 7a=3b=> a= 3b/7, inlocuim in prima si obtinem 2• 3b/7+5b=82, amplificam 5b cu 7 si obtinem 6b/7+35b/7=82, 41b/7=82, 41b=82•7, b=82•7:41, b=2•7, b= 14 => a=3•14/7, a= 3•2, a=6