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OpenStudy (anonymous):
solve the system of equation 2x-y = 6 3y=6x-18
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hartnn (hartnn):
divide both sides by 3 in 2nd equation 3y=6x-18 what u get ?
hartnn (hartnn):
any problems/doubts ?
OpenStudy (anonymous):
I got x=3
hartnn (hartnn):
how ? :O
hartnn (hartnn):
dividing 3y =6x -18 by 3, will give y = 2x - 6 got this ?
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OpenStudy (anonymous):
yes
OpenStudy (anonymous):
oh then i divided 6 by 2 that s why i got -3
hartnn (hartnn):
plug this equation for y in your 1st equation plug y =2x-6 in 2x-y = 6 what u get ?
OpenStudy (anonymous):
2
hartnn (hartnn):
how ?
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hartnn (hartnn):
|dw:1385832421029:dw| got that 6 ?
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