How do you solve the system $x + y = 5$ $x + y = 5$ and $y = 3$ $y = 3$ ?

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Answer 1 · 2018-05-18T12:27:58

See a solution process below:

Substitute $3$ $3$ (from $y = 3$ $y= 3$ ) for $y$ $y$ in the first equation and solve for $x$ $x$ :

$x + y = 5$ $x + y = 5$ becomes:

$x + 3 = 5$ $x + 3 = 5$

$x + 3 - 3 = 5 - 3$ $x + 3 - color(red)(3) = 5 - color(red)(3)$

$x + 0 = 2$ $x + 0 = 2$

$x = 2$ $x = 2$

The Solution Is:

$x = 2$ $x = 2$ and $y = 3$ $y = 3$

Or

$(2, 3)$ $(2, 3)$

How do you solve the system x + y = 5x+y=5x + y = 5 and y = 3y=3y = 3?