Question

Tim has some marbles.
Sue has twice as many marbles as Tim.
Jim has 15 marbles.
Tim, Sue and Jim have a total of 63 marbles.
How many marbles does Tim have?

Answer 1

Answer: x=16

so,16 marbles

Step-by-step explanation:

Marbles Tim have = x

Marbles Sue have = 2x

Marbles Jim have = 15

x+2x=3x

3x+15=63

3x=63-15=48

x=48/3

x=16

Answer 2

Answer:

We van Solve it by setting an equation.I am setting the amount of marbles that Tim has x. Sue has twice as many marbles as Tim, She will have 2x marbles. We do not need a variable for Jim, because he has 15 marbles. Now we can set up hos equation.

Step-by-step explanation:

$x + 2x + 15 = 63 \\ now \: we \: can \: solve \: for \: x \: . \:first \: \:we \: subtract \: 15 \: from \: both \: side. \\ x + 2x = 48 \\ next \: we \: combine \: all \: the \: x \: terms. \\ 3x = 48 \\ finally \: we \: divide \: both \: side \: to \: find \: how \: many \: marbles \: does \: tim \: has. \\ x = 16 \\ \\ so \: tim \: has \: 16 \: marbles.$