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Wittaler [7]
3 years ago
9

Please help! if anybody is good at equivalent polynomial expressions please help!!

Mathematics
1 answer:
scoundrel [369]3 years ago
7 0
The one you have highlighted is correct
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Elimination using addition and subtraction. <br> -4x+4y=-20<br> -2x+4y=-2
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I would subtract the 2nd from the first one

so -4x - -2x = -2x

4y - 4y = 0

-20 - -2 = -18


-2x = -18

now I would divide that by -2 to get the value for x

so no we have x = 9


now you just have to substitute that into one of the equations and simplify to get y


-2 X 9 + 4y = -2

-18 + 4y = -2

4y =16

y = 4



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