Question 201826
Very  good  work,,,,,(+41 should  be  -41)
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with  x=-7,,,substitute  back  into  1st  eqn
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7(-7) -8y = -1
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-49 -8y = -1
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-8y = -1 +49 = =48
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y = -6
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(-7,-6)  is  answer
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check,,,(1) 7(-7) -8(-6) = -1,,,-49 +48 =-1,,,,ok
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(2) 6(-7) +36 = -6,,,,-42 + 36 = -6,,,,,ok
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Good  work,,,Keep  it  going