This can be solve by 3 variable equation let x be the money of luke y money of rachel z money of daniel first equation x = y + 21 second equation x = z + 48 third equation x + y + z = 168 solving simultaneously x =79 y = 58 z = 31
First, get common denominators At the same time, turn these into mixed numbers 27/8 + x = 44/8 Subtract 27/8 from both sides x = 2 1/8 pounds Let’s x be how many more pounds the baby needs