How do you solve x = y + 3 and 2x + y = 9?
1 Answer
May 19, 2016
#x=4#
#y=1#
Explanation:
Given -
#x=y+3# ----------------(1)
#2x+y=9# ----------------(2)
Substitute
#2(y+3)+y=9#
#2y+6+y=9#
#3y+6=9#
#3y=9-6=3#
#y=3/3=1#
#y=1#
Substitute#y=1# in equation (2)
#x=1+3=4#
#x=4#
