Question

Which of the following equations is equivalent to (5 + x) + 2 = 7?


A. 5 + 2x = 7
B. 7x = 7
C. x + 7 = 7
D. 5x + 2 = 7

Answer 1

Drop the parentheses on the left side and add 5 and 2 together.

Answer 2

(5+x)+2=7
(5+x)=7-2
(5+x)=5
x=3


NONE of the above...
when you solve them, x=1, in comparison to your equation x=3 :/

Answer 3

One of the choices is definitely correct.

Answer 4

yes, unless you drop the parenthesis, than you would have,

It should be C. x+7=7

both equations = 0

Answer 5

so if you have,

5+x+2=7
x=0

C. x+7=7
x=0

Answer 6

No one mentioned x = 0. The only question is which choice represents an equation that is equivalent to the given one. The goal is not to solve the equation; it's simply to choose what the next step in solving the equation is.

Answer 7

Still, the question was,
Which of the following equations is EQUIVALENT to (5 + x) + 2 = 7?

EQUIVALENT referring to which equation is in the long run EQUAL to the given equation. The answer is still C.

Answer 8

Actually, the fact that x=0 comes simply from solving the first equation. It doesn't matter what specific numbers and variables go into the equation, as long as they are equal when simplified a very simple equation and an extremely complicated one can be equivalent. So yes, the answer is C.

Answer 9

Don't get me wrong I get what your saying and if I solved it, it was with the mare purpose to help him see how C was equivalent to the given equation.

Answer 10

Thank you maud101 ^.^

Answer 11

For sure