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a fost răspuns

(6x9-Z)-3x10+16:2=4x3x1. (A-6x3-8:4)+81:9-3x10=30:1:2. (75-B+5x6)-(63-5x8)=5x10+40:8. A+[(153-98:7)•4]-260=598:2. Va rog ajutatima

Răspuns :

1)(54-z)-30+8=12
(54-z)-22=12
54-z=22+12
54-z=34
z=54+34
  =88


2)(A-18-2)+9-30=15
(A-20)+23=15
A-20=15+23
A-20=38
A=38+23
   =61

3)(75-B+30)-23=55
75-B+30=55-23
75-B+30=32
75+30--32=B
B=73

4)A+(153-14)X4-260=299
A+556-260=299
A+296=299
A=299-296=3

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