Question

7×2+3×a×[3+2×(5+1)]=14

Answer 1

7×2+3×a[3+2×(5+1)]=14
7×2+3×a(3+2×6)=14
7×2+3×a(3+12)=14
7×2+3×a×15=14
14+3×a=15:14
14+3×a=1,07
14+3=a×1,07
14+3=1,07a
17≠1,07a

Answer 2

7×2×3×a×3+2×(5+1)]=14

7×2+3×a×(3+2×6)=14

7×2+3×a×(3+12)=14

7×2+3×a×15=14

14+45+a=14

59+a=14

a=59-14

a=45