$y = (\frac{1}{2}) x + 7$
$y = 3 x$
Consider the system of equation above. If (x, y) is a solution to the system of equation. Then what is the value of y + x?

2.8

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8.4

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11.2

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9.6

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Solution

The correct option is C 11.2
Since, these equations are already given in terms of y and x, let's just equate them and find the values.
$3 x = (\frac{1}{2}) x + 7$
$6 x = x + 14$
$5 x = 14$
$X = \frac{14}{5}$
Use the value of x in "y = 3x".
$y = \frac{42}{5}$
Therefore y + x = 56/5 = 11.2

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