What is the formula for solving for x where:

x + 3x  + 3x/2=660

Hi pelkeyrobyn:

The following is the solution to your problem with explanation of the steps:

Original question: 

x + 3x + 3x/2 = 660

Add up the multiples of x that don't have fractions:

4x + 3x/2 = 660

Express each term on the left in the same denominator, 2:

8x/2 + 3x/2 = 660

Add terms on left:

11x/2 = 660

Multiply both sides of equation by 2:

11x = 1320

Divide both sides by 11:

x = 1320/11

Put result into lowest terms:

x = 120


Check the result in the original question:

120 + 3(120) + 3(120)/2
= 120 + 360 + 360/2
= 120 + 360 + 180 
= 660 

Bingo!

Hope this helps you solve other similar questions on your own! :-)

websearcher-ga


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you get links to many useful sites for help in this area.

perfectly clear reminder of what I knew so well 35 years ago. My
nephew will be pleased. Thank you