Question

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you substitute into the first equation?


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A)
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B)
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C)
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D) 
`-2y - 10`

Answer 1

-x -2y = -10
To isolate x we need to move the y to the right side.
add 2y to both sides.
-x = 2y - 10
The x has to be positive so divide both sides by -1.
x = -2y + 10
LETTER A