Jamie gave Laura three dollars more than Laura already had now Laura has $19 how much did Jamie give her
Let "x" represent the amount Laura already had
Let "x + 3" represent the amount Jamie gave to Laura
x + x + 3 = 19
2x + 3 = 19
2x + 3 - 3 = 19 - 3
2x = 16
2x / 2 = 16 / 2
x = $8 <----- What Laura Already has
x + 3 = $11 <------ Amount Jamie gave Laura,
because 8 + 11 = 19