Saima112
Saima112
21-03-2015
Mathematics
contestada
what is the answer to y=6+4x and y=-5x-21
Respuesta :
baonguyenq1999
baonguyenq1999
21-03-2015
y=4x+6
y=-5x-21
4x+6=-5x-21
add both sides by 5x
also subtract both sides by 6
9x=-27
x=-3
plu x=-3 in y=6+4x
y=6-12
y=-6
Answer Link
eu99li
eu99li
21-03-2015
y
=6+4x
y
=-5x-21
=> 6+4x=-5x-21
9x=-27
x=-3
y=6+4*(-3)=6-12=-6
y=-6
Solution: (-3; -6)
Answer Link
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