Question

If three pieces of candy cost $2.10 how much would a four pieces cost

Answer 1

$2.80

Because $2.10 divided by 3 equals 0.7.
0.7+$2.10= $2.80

Answer 2

3x = $2.10
Divide by 3 on both sides.
x = $0.70

For four pieces, $0.70 x 4 = $2.80

Hope it helped! :)