How do you solve 7x - 2y = -8 and x = -2?

Question

2159 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-01-18T16:21:35

#y = -3#

Since you were given the value of #x# which is #-2#, all you have to do is substitute this value to the given equation.

Solution:

#7x - 2y = -8#
where #x = -2#

substituting #x# value in the equation would give us:

#7(-2) - 2y = -8#
#(-14) - 2y = -8#

simplifying equation by transposing #-14# to the right side,

#-2y = -8 color(blue)(+14#
#-2y = 6#

Divide each side by #-2# to get the value of #y#,

#y = 6/-2#

#y= -3#