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how did I solve the following problem:?(3.8)=9(4)-9(?)

the question marks are the blanks I need to fill in with a number

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What 9(4) means? Never saw such notation.

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James R. | PhD Graduate for Physics, Chemistry, Mathematics TutoringPhD Graduate for Physics, Chemistry, Mat...
4.9 4.9 (80 lesson ratings) (80)
0
I read the problem as _____*(3.8) = 9*(4) - 9*(_____)
 
Essentially you want the right side to look like the left side. Hence a number *(number).
 
The first step is to use the distributive property.
 
Since you have a 9 in both terms, you can factor the 9 out, so it looks like 9*(4 - ____)
 
You then have ____ * (3.8) = 9*(4 - ____)
 
Does this help you fill in the blanks, or do you need the next steps?
David S. | Algebra,Pre-Calc Trigonometry Tutor Available eveningsAlgebra,Pre-Calc Trigonometry Tutor Avai...
4.8 4.8 (99 lesson ratings) (99)
-1
3.8x+9x=9*4=36
12.8x=36
x=36/3.8=9.4736842105263157894736842105263