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28 November, 02:11

17 x (5+a) = 17 x b + 17 x 13

A = ?

B = ?

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Answers (1)
  1. 28 November, 02:28
    0
    a=-85/4

    b=53/4

    Step-by-step explanation:

    17x (5+a) = 17xb+221. (1)

    85+17xa=17xb+221

    85 + (17xa) - (17xb) - 221=0

    17xa-17xb=-136

    17x (a-b) = -136

    a-b=-8

    a=-8+b. (2)

    Replace a=-8+b to (1):

    17x5x (-8+b) = 17xb+221

    85x (-8+b) = 17xb+221

    -680+85xb=17xb+221

    -680+85xb-17xb-221=0

    -68xb-901=0

    -68xb=901

    b=-53/4

    Replace b=-53/4 to (2):

    a = - 8 + (-53/4) = - 85/4
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