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what is the answer to y=6+4x and y=-5x-21

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Baonguyenq1999id
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
Eu99liid

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)

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