An algebra problem by Lexi Sun

Dunno, I'm in kindergarten.

Linear equation =

• 6 + y = 11
• y = 11 - 6 = 5 ( 6 + y - 6 = 11 - 6)
• Therefore, y = 5.

$\begin{cases} x+ y &= 11 &\ldots (1) \\ x-y &= 1 &\ldots (2) \end{cases}$

$(1) - (2) \implies 2y = 10 \implies \boxed{y=5}$

$x + y = 11$

$\boxed{x = 6}$

$y = 11 - 6$

$\boxed{y = 5}$

First, find an easier way. If 6+ =11 and 6- =1 what is _? Try 5 because, 6+5=11 then 6-5=1 right? Yes, so 5 is the right answer. :) YaY