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5 November, 06:36

What is the value of x + y + z when 6x + 5y - 2z = - 4 and 4x + 5y + 12z = 54?

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  1. 5 November, 07:47
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    5

    Step-by-step explanation:

    First you would need to add the two equations.

    6x + 5y - 2z = - 4 + 4x + 5y + 12z = 54

    Doing this, you would get:

    10x+10y+10z=50

    Then, divide all parts of the equation by 10 to isolate the variables.

    So,

    10x+10y+10z=50/10 =

    x+y+z = 5
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