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anonymous
 one year ago
Stan's statement:
Equation  5+2(x+4)=105(x3)
Step 1  5+2x+8=105x+15
Step 2  13+2x=255x
Step 3  133x=25
Step 4  3x=12
Step 5  3x/3=12/3
Step 6  x=4
Which statement about Stan's solution is true?
A. Stan's solution is correct.
B. Stan has a mistake in Step 1.
C. Stan has a mistake in Step 2.
D. Stan has a mistake in Step 3.
My work:
Equation  5+2(x+4)=105(x3)
5+2x+8=10+5x+15
13+2x=25+5x
+5x= +5x
13+7x=25
13 =13
7x/7=12/7
x=1 7/10
B. Stan has a mistake in Step 1.
Is this correct? Did I make a mistake in my work?
anonymous
 one year ago
Stan's statement: Equation  5+2(x+4)=105(x3) Step 1  5+2x+8=105x+15 Step 2  13+2x=255x Step 3  133x=25 Step 4  3x=12 Step 5  3x/3=12/3 Step 6  x=4 Which statement about Stan's solution is true? A. Stan's solution is correct. B. Stan has a mistake in Step 1. C. Stan has a mistake in Step 2. D. Stan has a mistake in Step 3. My work: Equation  5+2(x+4)=105(x3) 5+2x+8=10+5x+15 13+2x=25+5x +5x= +5x 13+7x=25 13 =13 7x/7=12/7 x=1 7/10 B. Stan has a mistake in Step 1. Is this correct? Did I make a mistake in my work?

This Question is Closed

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5Are you using  to mean minus or just a dash? In Equation  5+2(x+4)=105(x3), is the equation supposed to be  5+2(x+4)=105(x3) OR 5+2(x+4)=105(x3)? It is dangerous to use dashes in mathematics.

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5I thought that Stan's equation is this:  5+2(x+4)=105(x3). I got the same thing he did for his first step.

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5In your work, I think you lost the negative sign in front of the 5. My work: Equation  5+2(x+4)=105(x3) 5+2x+8=10+5+15

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well, I don't usually use dashes, it is just hard for me to type math problems on a computer. The equation is 5+2(x+4)=105(x3).

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5I got this for the first step which is what Stan got: 5+2x+8=105x+15 5+2x+8=10+5+15 yours You left out the x on +5 + 15 but I think you got what Stan did.

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5Do you think that this step Stan did is correct: Step 3) 133x=25

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5Let's look at it: Step 2) 13 +2x = 25  5x +5x = + 5x  13 + 7x = 25

Directrix
 one year ago
Best ResponseYou've already chosen the best response.57x/7=12/7 x=1 7/10 12/7 = 1 5/7

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5Step 3 is where I think Stan made an error. What do you think: Step 3: 133x=25

Directrix
 one year ago
Best ResponseYou've already chosen the best response.5Because: Step 2) 13+2x=255x 13 + 5x + 2x = 25 Step 3) 13+ 7x = 25 That is not what Stan got for Step 3.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No, Stan messed up Step 3. Step 1 and 2 in my work looked the same as Stan's. Stan subtracted 5 from 2x instead of adding 5 to 2x.
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