How do you solve by substitution $x + y = 10$ and $y = x + 8$ ?

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Answer 1 · 2018-03-08T14:01:55

$color(magenta)(therefore x=1 and y=9$

$y=x+8$

Given that,

$x+y=10$

$x+x+8=10$

$2x+10=8$

$2x=10-8$

$2x=2$

$x=2/2$

$color(red)(x=1$

$y=x+8$

$y=1+8$

$color(red)(y=9$

$color(magenta)(therefore x=1 and y=9$

~Hope this helps! :)

How do you solve by substitution x + y = 10 x + y = 10 and y = x + 8y = x + 8?