Question 462921

{{{8x+5y=5}}}....1...both sides multiply by {{{2}}} and you will get {{{16x+10y=10}}}

{{{7x+10y=-1}}}.......2

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{{{16x+10y=10}}}.........1
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{{{7x+10y=-1}}}...........2....subtract 2 from 1
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{{{16x-7x+10y-10y=10-(-1)}}}

{{{9x+cross(10y)-cross(10y)=10+1}}}

{{{9x=11}}}

{{{x=11/9}}}

{{{x=1.2222222222222222222222222222222}}}


{{{x=1.222}}}

now find {{{y}}}

{{{7(1.22)+10y=-1}}}

{{{8.54+10y=-1}}}

{{{10y=-1-8.54}}}


{{{10y=-9.54}}}

{{{y=-9.54/10}}}

{{{y=-0.954}}}

check:


{{{8x+5y=5}}}....1

{{{8(1.222)+5(-0.954)=5}}}

{{{9.77-4.77=5}}}

{{{5=5}}}