How do you solve #5x-y =20# and #6x+49 =y# using substitution?
1 Answer
Aug 30, 2017
#x=-69#
#y=-365#
Explanation:
Given -
#5x-y=20# ---------------------(1)
#6x+49=y# ---------------------(2)
Substitute
#5x-(6x+49)=20#
#5x-6x-49=20#
#-x=20+49=69#
#x=-69#
Substitute
#y=6(-69)+49#
#y=-414+49=-365#
#y=-365#
