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kap26 [50]
3 years ago
10

Elevii clasei a IV-a au fost la patinoar. Stiind ca numarul baietilor reprezinta jumatate plus 3 din numarul copiilor si ca numa

rul fetelor este 10, afla cati copii au fost la patinoar.
Mathematics
1 answer:
earnstyle [38]3 years ago
3 0

Step-by-step explanation:

Să presupunem că x să fie numărul de copii

De\:asemenea

să fiu fetele

f = 10

și

b\:=\:\frac{x}{2}\:+\:3

f\:+\:b\:=\:x

substituirea valorilor

10\:+\:\frac{x}{2}\:+\:3\:=\:x

20\:+\:x\:+\:6\:=\:2x

x\:=\:26     copii au fost la patinoar

b=\frac{26}{2}+\:3

b\:=\:16\:baieti

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