Question

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Answer 1

Răspuns:

a =28;b=21

Explicație pas cu pas:

a numărul

2a/3b=8/9

a+b=49

a=49-b

2(49-b)/3b=8/9/:2

(49-b)/3b=4/9

9(49-b)=12b

9×49=9b+12b

9×49=21b/:21

3×7=b

b=21

a=49-b=49-21=28

verificare

2×28/3×21=2×4×7/3×7×3=8/9