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26 July, 15:01

What is the value of x?

1. 6 (-3 - x) - 2x = 14

x=

2. 2/7x + 6 + 17x = 18

x=

+2
Answers (1)
  1. 26 July, 18:05
    0
    1) expand the brackets

    6 (-3 - x) - 2x = 14

    -18 - 6x - 2x = 14

    simplify

    -18 - 8x = 14

    then add 18 to both sides to get the x's on there own

    -8x = 32

    then divide by - 8

    x = 32/-8

    x = - 4

    2) multiply everything by 7x

    2 + (6 x 7x) + (17x * 7x) = 18 x 7x

    2 + 42x + 119x^2 = 126x

    put everything on one side

    119x^2 - 84x + 2 = 0

    then use quadratic equation to solve

    x = 0.024671849 or 0.6812105039
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