Monday

July 28, 2014

July 28, 2014

Posted by **Anonymous** on Friday, December 21, 2012 at 3:08pm.

a. 3x – 3 = –4x

b. 2y + 4 – y = 16

c. 7x + 5 = 4x + 5 + 3x

d. 6y – 2 = 2(y – 1)

And please explain how I don't understand. Thanks sooooo much!!!

- Pre Algebra Help ASAP -
**bobpursley**, Friday, December 21, 2012 at 3:14pmlook at c. Why can't you solve for x, as in the others?

- Pre Algebra Help ASAP -
**Linda**, Friday, December 21, 2012 at 3:19pmThe reason the that C has an infinite number of solutions as opposed to the others is because you essentially have

7x +5 = 7x +5 (because you can add the

4x and 3x to make 7x so any answer will work because it will be the same answer on each side no matter what and the other problems will all end up with X = to something were as C would end up 0=0

- Pre Algebra Help ASAP -
**Bosnian**, Friday, December 21, 2012 at 3:34pma.

3 x – 3 = – 4 x Add 4x to both sides

3 x – 3 + 4 x = – 4 x 4 x

7 x - 3 = 0 Add 3 to bozh sides

7 x - 3 + 3 = 0 + 3

7 x = 3 Divide both sides by 7

x = 3 / 7

ONLY ONE SOLUTION

b.

2 y + 4 – y = 16

y + 4 = 16 Subtracr 4 to both sides

y + 4 - 4 = 16 - 4

y = 12

ONLY ONE SOLUTION

c.

7 x + 5 = 4 x + 5 + 3 x

7 x + 5 = 7 x + 5

THAT IS TRUE FOR ALL VALUES OF x.

INFINITE NUMBER OF SOLUTIONS

d.

6 y – 2 = 2 ( y – 1 ) Divide both sides by 2

3 y - 1 = y - 1 Subtract y to both sides

3 y - y - 1 = - y - 1 - y

2 y - 1 = - 1 Add 1 to both sides

2 y - 1 + 1 = - 1 + 1

2 y = 0 Divide both sides by 2

y = 0

ONLY ONE SOLUTION

CORRECT ANSWER :

c

**Related Questions**

math - Determine the number of solutions for the following system of equations ...

math - Explain why the simultaneous equations y=1/2x+2 and 2y-x:4 have an ...

Mathsa - Which of the following equations has an infinite number of solutions? (...

Mathsa - Which of the following equations has an infinite number of solutions? (...

1 last math question - 3. Which of the following equations has an infinite ...

Math urgent! :( plz help - 3. Which of the following equations has an infinite ...

Math 2 questions :/ - Which of the following equations has an infinite number of...

Algebra - Make a conjecture about the solution of a system of equations if the ...

MATH 1 QUESTION!!!?? - 3. Which of the following equations has an infinite ...

Math - Which of the following equations has an infinite number of solutions? (1 ...