Question

Suma a 2 nr este 879, iar catul si restul sunt 3 , respectiv 7 . Afla numerele?

Answer 1

x = 879-y
x:y=3 rest7 = x = 3y+7
3y+7 = 879-y
4y = 872
y = 218
x = 879-218
x = 661

Answer 2

$\left \{ {{a+b=879} \atop {a:b=3r7}} \right. ==\ \textgreater \ \left \{ {{a+b=879} \atop {a=3b+7}} \right. ==\ \textgreater \ Inlocuim ==\ \textgreater \ 3b+7+b=879$ [tex]==\ \textgreater \ 4b+7=879 ==\ \textgreater \ 4b=872 ==\ \textgreater \ b=218 a+218=879 [/tex]
a=879-218
a=531