Question

Sam puts 14 coins into 4 different rows. The first row has 3 more coins than the second row. The second row has 1 coin less than the third row. The fourth row now has twice as many coins as the second row. Find the number of coins in each row.

Answer 1

Row 1: 5 coins

Row 2: 2 coins

Row 3: 3 coins

Row 4: 4 coins

Work:  let 0 be a coin.

so... :R1 00000 since r2 has 2 coins, then 2+3=5

        R2 00 since r3 has 3 coins, then 1-3=2

        R3 000 since r2 is 1 less than this row

        R4 0000  and since r4 is 2x2

Hope this helped!!

:)