85) I gonna do substitution to solve them.
First lets find number of boys.
boys = x
girls = x - 5
27 = x + x - 5 --) 27 = 2x - 5 --) 32 = 2x --) 16 = x
There are 16 boys.
Now do the opposite with girls.
boys = x + 5
girls = x
27 = x + x + 5 --) 27 = 2x + 5 --) 22 = 2x --) 11 = x
There are 11 girls.
86) I gonna do subsitution to solve this problem too.
x + y = 82
6x + 2y = 284
First find # of car magnets
y = -x + 82
6x + 2( -x + 82 ) = 284 --) 6x - 2x + 164 = 284 --) 4x + 164 = 284 --) 4x = 120 --)
x = 30
There are 30 car magnets.
x = -y + 82
6( -y + 82 ) + 2y = 284 --) -6y + 492 + 2y = 284 --) -4y + 492 = 284 --) -4y = -208 --) 4y = 208 --) y = 52
There are 52 bumper stickers
