Search 73,773 tutors
FIND TUTORS
Ask a question
0 0

can u help me on 4(3x+4)-2(3x-7)

Tutors, please sign in to answer this question.

2 Answers

4(3x+4)-2(3x-7)
 
step 1: Multiply to get  12x + 16 - 6x + 14
 
step 2: Combine like terms
12x - 6x = 6x             16 + 14 = 30
 
step 3: The result is:      6x = 30
 
step 4: Divide each side by 6 to get "x" by itself
6x/6 = 30/6
 
x = 5
 
 
 
 
 
 
 
 
Hi Sam;
4(3x+4)-2(3x-7)
Your first priority is to distribute....
Let's begin with the first parenthetical equation...
4(3x+4)
12x+16
 
Second parenthetical equation...
-2(3x-7)
Note the fact that the subtraction sign is also a negative sign for the 2...
-6x+14
Note the fact that -7, when multiplied by -2, becomes POSITIVE 14...
12x+16-6x+14
Let's combine like terms...
12x-6x=6x  and 16+14=30
 
6x+30

Comments

Sam,
 
Vivian meant 6x=30 on her last line.
David,
This is an expression, not an equation.  There is no = sign in the original expression, there should be no equal sign in the conclusion.  Kelisha needs to correct her answer.
Thanks for pointing that out, vivian. I was definitely doing too many things at once. LOL