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OpenStudy (anonymous):
solved by the substitution method 9x+y=72 x-6y=63 What is the solution of the problem?
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OpenStudy (theviper):
x=63+6y
OpenStudy (theviper):
because x-6y=63
OpenStudy (theviper):
Put this value in the first eq
OpenStudy (theviper):
& find y then find x:)
OpenStudy (anonymous):
but what value in the first eq whats is the answer?
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OpenStudy (theviper):
9x+y=72.......(1) x-6y=63 or x=63+6y Putting the value of 'x' in the eq (1) we got:- 9(63+6y)+y=72 567+54y+y=72 Now solve & find y
OpenStudy (theviper):
understood???
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