Answer:
[tex] \sf \implies \: - 6w - 8 + 1 -7w \\ \sf \implies \: - 6w - 7w - 7 \: \: \: \: \: \: \: \: \\ \sf \implies \: - 13w - 7 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
Hence, option (b) - 13w - 7 is correct.
Hope it helps you mate :)
