ii dont understand how to solve a system of linear equations using the substitution method

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23-02-2015
Mathematics

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ii dont understand how to solve a system of linear equations using the substitution method

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apologiabiology apologiabiology · Answer 1 · 2015-02-23T03:05:03+01:00

apologiabiology apologiabiology

23-02-2015

so 8x-7y=-7
-16+12x=14
you can simplify the sceon equation
-8+6x=7
add 8 to both sides
6x=15
divide by 6
x=15/6
subssitute
8(15/6)-7y=-7
120/6-7y=-7
20-7y=-7
subtract 20
-7y=-27
divide by -7
y=27/7

x=15/6
y=27/7

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