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expeople1 [14]
3 years ago
13

2x-y=3; x=2 how do I solve this

Mathematics
1 answer:
Solnce55 [7]3 years ago
8 0

2x-y=3

use the substitution method

2(2)-y= 3

4-y= 3

move 4 to the other side

sign changes from +4 to -4

4-4-y= 3-4

-y= 3-4

-y=-1

mutiply both sides by -1 to get +y

(-1)(-y)= (-1)(-1)

y= (-1)(-1)

Answer: y= 1

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since BD = BD (obviously), we can also say that the righthand sides of the two equation must be equal

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seems true

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