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MakcuM [25]
4 years ago
6

For the following system, if you isolated x in the second equation to use the Substitution Method, what expression would you sub

stitute into the first equation?
3x + y = 8
−x − 2y = −10
A.-2y+10
B. 2y+10
C. 2y-10
D.-2y-10
Mathematics
2 answers:
kogti [31]4 years ago
7 0
The original equation we have is : <span>−x − 2y = −10
We need to isolate the x, which means that we need to get x alone on one side of the equation preferably in a positive form.

So, going back to the original expression:
</span><span>−x − 2y = −10
To make x positive, we will add x to both sides of the equation, thus, we get:
-2y = -10 + x
The next step is to eliminate the -10 from beside the x. To do this we will add 10 to both sides of the equation. When doing this we get:
x = -2y + 10

Based on this, the correct choice is A : -2y + 10</span>
Ghella [55]4 years ago
3 0

Answer:

it's A

Step-by-step explanation:

-2,+10

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