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ILL GIVE BRAINLEST PLSuse the substitution method to solve the system of linear equations. check your solution.
y=-5x
21x-7y=28

Respuesta :

emmerjord

Answer:

1/2 or .5

Step-by-step explanation:

21x−7(−5x)=28

21x−(−35x)=28

21x+35x=28

56x=28

x=  56/ 28

x= 1/2

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