Question

7×2+3×b×[3+2×(5+1)]=14

Answer 1

7×2+3×b×[3+2×(5+1)]=14

$14 + 3b \times (3 + 2 \times 6) = 14$

$3b \times (3 + 12) = 0$

$3b + 15 = 0$

$45b = 0$

$b = 0$

Answer 2

7 × 2 + 3 × b × [ 3 + 2 × ( 5 + 1 ) ] = 14

14 + 3 × b × ( 3 + 2 × 6 ) = 14

14 + 3 × b × ( 3 + 12 ) = 14

14 + 3 × b × 15 = 14

3 × b × 15 = 14 - 14

3 × b × 15 = 0

3 × b = 0 : 15

3 × b = 0

b = 0 : 3

b = 0