Question

Jess spent

7x minutes on the computer. Her sister spent
5x+10 minutes on the computer, which was the same amount of time Jess spent. How many minutes was Jess on the computer?

Answer 1

Explanation:

If Jess spent 7x minutes on the computer, we see that there is a variable X which is the amount of minutes Jess spent on the computer multiplied by 7.

Jess' sister spent an equal amount of time on the computer so right away we can say that 7x=5x+10

To get the variable X by itself, we have to subtract 5x from both sides of the equation leaving us with 2x=10

Lastly, we have to isolate the X variable to determine its value. We do that by dividing X by its coefficient 2 across both sides.

X=5

By plugging X in to the original equations: 7(5)=5(5)+10 - both sides equal thirty-five and so this equation is true.

So therefore, Jess spent thirty-five minutes on the computer.