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Nostrana [21]
3 years ago
14

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

Mathematics
1 answer:
Serga [27]3 years ago
6 0

Answer:

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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