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afla nr nescunoscut din egalitatea:
(25xA+250): (35: 7) - 25=75

Va roog repeedee.
Dau COROANA​


Răspuns :

(25xA+250):(35:7)-25=75

(25xA+250):5=75+25

(25xA+250):5=100

25xA+250=100x5

25xA+250=500

25xA=500-250

25xA=250

A=250:25

A=10

P.S.:Sper ca te-am ajutat!

( 25 × a + 250 ) : ( 35 : 7 ) - 25 = 75

( 25 × a + 250 ) : 5 - 25 = 75

( 25 × a + 250 ) : 5 = 75 + 25

( 25 × a + 250 ) : 5 = 100

( 25 × a + 250 ) = 100 × 5

25 × a + 250  = 500

25 × a = 500 - 250

25 × a = 250

a = 250 : 25

a = 10