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2{[5(c-4)+15]-[3(5c-3)+1]}

Can someone help me to figure out this equation. I don't remember how to do this with the outside brackets

  • math -

    start with the innermost brackets and work outwards

    2{[5(c-4)+15]-[3(5c-3)+1]}
    = 2{[5c-20+15]-[15c-9+1]}
    = 2{[5c-5]-[15c-8]}
    = 2{5c-5-15c+8]}
    = 2{-10c+3]}
    = -20c + 6

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