How do you solve the following linear system: # y = - 3x + 8, 2x + y = 15 #?
1 Answer
Nov 14, 2015
#x=-7#
#y=29#
Explanation:
#y=-3x+8# --------------------(1)
#2x+y=15# ---------------------(2)
Substitute >
#2x+(-3x+8)=15#
#2x-3x+8=15#
#-x=15-8=7#
#x=-7#
Put
#y = -3(-7)+8#
#y =21+8=29#
#y=29#
