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frutty [35]
4 years ago
13

Substitution for x+2y=11 and -8x+6y=22

Mathematics
1 answer:
DochEvi [55]4 years ago
7 0
<span>x+2y=11
can be written as
x = 11 - 2y

substitute x into the other equation
</span>-8(11 - 2y) + 6y=22
<span>simplify

-88 + 16y + 6y = 22
-88 + 22y = 22
+88           +88            isolate y

22y = 110
-----    -----
22        22

y = 5! now add Y into the equation to find X

</span>-8x+6(5)=22
<span>-8x+30=22
     - 30 -30
-8x = -8
----   ----
-8     -8

x = 1                   (1,5) Is the solution



</span>
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