Write and solve an equation to determine how may books each person has.
# books Annie = x
# books Selina = y
# books Laura = z
x= 5 + y
y = 2z - 3
x + y + z = 114
SOLVE SIMULTANEOUSLY USING SUBSTITUTION "x = 5 +y" and "y = 2z - 3"
2z - y=3--> 4z-2y=6
5+y+y+z=114 --> 2y+z=109
Adding the two equations,
5z+0=115
So, z=23
y=43
x=48