Question

Andy and Sally had $384 altogether. Andy had $8 more than Sally. Andy
spent twice as much as Sally and was left with half as much as Sally. How
much money did Sally spend?

Answer 1

$384 - 3×$8 = $360
$376=(3+3) = $60
560 + 58 = $68

Answer 2

sally had x
Andy had x+8
x + x+8 = 384
x = 188

So at the start Sally had $188 and Any had $196

amount spent by Sally --- y
amount spent by Andy --- 2y

amount left by Andy = 196-2y
amount left by Sally = 188-y

196-2y = (1/2)(188-y)
392 - 4y = 188 - y
-3y = -204
y = 68

so Sally spent $68