3(r – 0.3r) – 5= 3(r-0.3r-5) Um, can someone help me solve step, by step

Question

mathmale · Answer

Why repost the same question, when others have already tried to help you with it?
I asked you to perform the operations WITHIN PARENTHESES first.

Next, carry out the indicated multiplication by 3.
Show all steps of your work if you want feedback and guidance.

mathmale · Answer

Hint:  What is r-0.3r?

What is:

       r
 -0.3r
--------

????

anonymous · Answer

3x r-0.3r/-5x3 ?

I have no idea what you're asking for :(  sorry @mathmale

mathmale · Answer

The work you must do in this problem is similar to that y ou're doing in another problem right now:  Using the distributive property of multiplication.

3(r – 0.3r) – 5= 3(r-0.3r-5)        is easier to test for equality (or no equality) if you'd first combine the quantities inside parentheses.      That r - 0.3r becomes 1.0r-0.3r=0.7r.

Then, on the left side of your equation, you have 3(0.7r) - 5.  On the right side you have
3(0.7r-5).

Please look at this intermediate equation:    3(0.7r) – 5= 3(0.7r-5)  and decide whether or not the equation is true.