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24.09.2019 •
Mathematics
What is the full solution of the system by using the substitution method:
3x+y=10
y=6x+1
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Ответ:
9x+1=10
9x+1-1=10-1
9x=9
9x/9=9/9
x=1
Ответ:
sub 6x+1 for y in other equation
3x+6x+1=10
9x+1=10
minus 1 both sides
9x=9
divide both sides by 9
x=1
sub back
y=6x+1
y=6(1)+1
y=7
x=1
y=7
(1,7)
Ответ:
you would multiply each value by the scale factor