Question

A = 5 − 2[18 ÷ 6 − 2(6 × 2 × 3 ÷ (4 + 5))]

Answer 1

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5 − 2[18 ÷ 6 − 2(6 × 2 × 3 ÷ (4 + 5))]

=5−2(3−2((6×2×3)÷4+5))

=5−2(3−2((12×3)÷4+5))

=5−2(3−2(36÷4+5))

=5−2(3−2(36÷9))

=5−23−2×4

=5−2(3−8)

=5−(2)(−5)

=5−(−10)

=15