Question

suma a doua nr este 10. daca marescfin primul nt de doua ori iar din al doilea il micsorezde doua ori obtin nr egale . aflati nr?

Answer 1

a + b = 10
a × 2 = b : 2
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a,b = ?
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1. 2a = b : 2 =) b = 2× 2 a =) b = 4 a
2. a. + b = 10
inlocuim
a + 4 a = 10
5. a = 10
a = 2
b = 10 - 2 = 8

Answer 2

a+b=10
ax2=b:2
4a=b
a=b/4
b/4+b=10
b+4b=40
5b=40
b=40:5
b=8
a=8:4=2
a+b=2+8=10