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a fost răspuns

Rezolvati multimea ° ecuatiile:
A) 2(x+1)-7=9
B)16-(x-1)=7
C) (x-3):4+1=2
D)24:(2x-5)-2=6
VA ROG DAU COROANA+29 PUNCTE

Răspuns :

2(x+1)-7=9
2(x+1)=9+7
2(x+1)=16
x+1=16:2
x+1=8
x=8-1
x=7

16-(x-1)=7
x-1=16-7
x-1=9
x=9+1
x=10

(x-3):4+1=2
(x-3):4=2-1
(x-3):4=1
x-3=1×4
x-3=4
x=4+3
x=7

24:(2x-5)-2=6
24:(2x-5)=6+2
24:(2x-5)=8
2x-5=24:8
2x-5=3
2x=3+5
2x=8
x=8:2
x=4

CRED CA II BINE

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