How do you solve the system of equations #y= 2x - 5# and #6x - 3x = 18# by substitution?
1 Answer
Jul 9, 2017
Explanation:
#y=2x-5to(1)#
#6x-3x=18to(2)#
#"we can solve for x from " (2)#
#rArr3x=18larr" simplifying left side"#
#"divide both sides by 3"#
#(cancel(3) x)/cancel(3)=18/3#
#rArrx=6#
#"substitute x = 6 in " (1)#
#y=(2xx6)-5=12-5#
#rArry=7#
#rArr"point of intersection " =(6,7)#
graph{(y-2x+5)(y-1000x+6000)=0 [-20, 20, -10, 10]}
