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ajutatimaa va rog ex 7

Ajutatimaa Va Rog Ex 7 class=

Răspuns :

(x+20):5=7
x+20=7*5
x+20=35
x=35-20
x=15

(32+x) :8=7
32+x=7*8
32+x=56
x=56-32
x=24

(21+35):x=8
56: x=8
x=56:8
x=7

(27+45):x=8
72: x=8
x=72:8
x=9

(15+20):5=7
(32+24):8=7
(21+35):7=8
(27+45):9=8