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a fost răspuns

(6 x 5 + 4 x j - 8 ) :6 = 28 : 4

Răspuns :

Sofym
(30+4·j-8):6=7
30+4·j-8=7·6
30+4·j-8=42
30+4·j=42+8
30+4·j=50
4·j=50-30
4·j=20
j=20÷4
j=5
(6 X5 +4XJ-8):6=7
6x5 +4x j -8 =42
6x5 + 4 x j=50
4xj=50-30
4xj=20
j=20:4
j=5