[tex]\boxed{\underline{\bf \: ANSWER}}[/tex]
[tex] \sf \: 120 = - 8(5b - 5) \\ \sf \: \: Remove \: the \: brackets \: and \: multiply \: 8 \: and \: 5\: \\ \\ \sf \: 120 = - 40b + 40 \\ \sf \: 120 - 40 = - 40b \\ \sf \: 80 = - 40b \\ \sf \frac{ 80}{ 40} = - b \\ \sf \: \frac{ \bcancel80}{ \bcancel40} = - b \\ \sf \: 2 = - b \\ \longrightarrow \: \boxed{\underline{\bf - 2 = b}}[/tex]
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Hope it helps.
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