Question

2x(a+4×6-3×7)=15+6÷2×3

Answer 1

2(a + 4×6 - 3×7) = 15 + 6÷2×3

2(a + 24 - 21) = 15 + 9

2a + 6 = 24

2a = 18

a = 9

Answer 2

Salut,

2 × (a + 4 × 6 - 3 × 7) = 15 + 6 ÷ 2 × 3

2 × (a + 24 - 3 × 7) = 15 + 3 × 3

2 × (a + 24 - 21) = 15 + 9

2 × (a + 24 - 21) = 24

a = (24 ÷ 2) + 21 - 24

a = 12 + 21 - 24

a = 33 - 24

a = 9