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OpenStudy (anonymous):
6x + 6y + 3z=494 3x + 3y + 3z= 250 in the system of equations above, what is the value of 9x+9y
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OpenStudy (anonymous):
subtract the equations from each other\[\huge {(1)-(2)}\]
OpenStudy (anonymous):
ty
OpenStudy (anonymous):
3x+3y=494-250 then multiply by 3
OpenStudy (anonymous):
why 3
OpenStudy (anonymous):
so that we have 3*3=9 9x+9y=3(494-250)
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OpenStudy (anonymous):
k
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