Răspuns
3+4 × ( X : 4 - 12 ) = 9.
3+4+(x:4)=9+12
3+4+(x:4)=21
3+4+x=21*4
3+4+X 84
4+X=84-3
4+x=81
X=81-4
X=77
24+ [29-2×(X+1)]= 33.
24+(29-2×x=33-1
24+(29-2*x)=32
24+(29-x)=32*2
24+(29-x)=16
24+x=16+29
24+x=45
X=45-24
X=21
{[( X - 8) × 7+6-5]-4}×3-2 = 10
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