How do you solve $x + y = 5$ and $2x - y = 4$ using substitution?

Question

How do you solve $x + y = 5$ and $2x - y = 4$ using substitution?

1 Answer

Impact of this question

15762 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-08-04T12:19:28

$x=3$
$y=2$

Explanation:

$x+y=5$
$2x-y=4$
Adding up the above equations we get
$x+2x+y-y=5+4$
or
$3x+0=9$
or
$3x=9$
or
$x=9/3$
or
$x=3$ =========Ans $1$
So From equation $x+y=5$ we get
$3+y=5$
or
$y=5-3$
or
$y=2$ =========Ans $2$

Science

Math

Humanities

... and beyond

How do you solve $x + y = 5$ and $2x - y = 4$ using substitution?

1 Answer

Explanation:

Related questions

Impact of this question

Science

Math

Humanities

... and beyond

How do you solve x + y = 5x + y = 5 and 2x - y = 42x - y = 4 using substitution?

1 Answer

Explanation:

Related questions

Impact of this question

How do you solve $x + y = 5$ and $2x - y = 4$ using substitution?