1 a-2a-{3a-(4a-5)} i need help plz and on this one to 13(5-t)-(5-t)-12(5-t)

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1 a-2a-{3a-(4a-5)} i need help plz and on this one to
13(5-t)-(5-t)-12(5-t)

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Orla Orla 3 years 2021-08-28T07:29:40+00:00 1 Answers 0 views 0

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    2021-08-28T07:31:24+00:00

    13(5-t)-(5-t)-12(5-t)
    =65-13t-5-t-60+12t
    =-13t-t+12t+65-5-60
    =-2t

    a-2a-{3a-(4a-5)}
    =a-2a-3a-4a-5
    =-8a-5

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