Question

Daca 4512+b=a+2110=5000,atunci (a+b)-(a-b) este egal cu: a)3378, b)2402, c)976, d)5000, e)2890

Answer 1

4512+b=a+2110=5000

4512+b=5000
b=5000-4512
b=488

a+2110=5000
a=5000-2110
a=2890

a+b=2890+488
a+b=3378

a-b=2890-488
a-b=2402

(a+b)-(a-b)=
=3378-2402=
=976