algebra

-2(x-1)+3(x-1)=4(x+5)

1/2x+7=3/4x-4

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  1. for the first one, multiply each term by (x-1)(x+5)

    -2(x+5) + 3(x+5) = 4(x-1)

    expand and solve....

    for the second one, I assume you meant :

    1/(2x+7) = 3/(4x-4)

    cross-multiply ....
    6x+21 = 4x-4
    2x = -25
    x = -25/2

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