What does this answer mean? Like, what is a “solution set” and an “identity?” I know what multiplicative (x1) and additive identities (+0) are, but what is this? What is true for any value of x? That 4 = 4? And if so, what does that even mean? Solve 2(x + 1) - (x - 2) = x + 4 for x.
SOLUTION
2(x + 1) - (x - 2) = x + 4
2x + 2 - x + 2 = x + 4
x + 4 = x + 4
4 = 4

“This is true for any value of x. The solution set is all real numbers. This equation is an example of identity.”

only 10/60 isn't equivalent

hope this : )

according to egenuity the answer is

step-by-step explanation:

d. 344.22

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !