Question

Nu inteleg ultima parte din exercitiu

Il poate face cineva va rog?
Multumesc

Answer 1

Fie a,b-doua numere

5/9×a+3/7×b=1605

5/9×a=3/7×b+855

3/7×b+3/7×b+855=1605

6/7×b+855=1605

6/7×b=1605-855

6/7×b=750

b=750:6/7

b=750×7/6

b=125×7

b=875

5/9×a=3/7×875+855

5/9×a=3×125+855

5/9×a=375+855

5/9×a=1230

a=1230:5/9

a=1230×9/5

a=246×9

a=2214