Question

38×a+120):25×54]-980=100
7777-(77:7+a-7777:7+777)×7=777
80×(a:16-64)x60-3980]:4=3805
Rapid va rog dau coroana❗❗❗❗Si ma si abonez❗❗(Vreau toata rezolvarea!!)

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Answer 1

(38a + 120) : 25 × 54 = 100 + 980

(38a+ 120) : 25 × 54 = 1080

(38a + 120 ) : 25 = 1080 : 54

(38a + 120) : 25 = 20

38a + 120 = 20 × 25

38a + 120 = 500

38a = 500 - 120

38a = 380

a = 380 : 38

a = 10

7777 - (11 + a - 1111+ 777) × 7 = 777

7777 - ( 11 + a - 1888) = 777: 7

7777 - (11 + a - 1888) = 111

11 + a - 1888 = 7777 - 111

11 + a - 1888 = 7666

11 + a = 7666 + 1888

11 + a = 9554

a = 9554 - 11

a = 9543

la a treia nu stiu, scuze