HEY YOU u kinda cute ngl need help ASAP

Answer

Only Lin's moves will lead to the solution.

Explanation

To find d, you need to have variables on one side, and constants on the other. Elena is wrong because her move cannot be done to find the solution.

I'll explain using examples and solve the problem step by step.

First let's start with Lin's solution... dividing by 2.5d.

Divide 2.5d from both sides.

7.5d divided by 2.5d is 3.

2.5d divided by 2.5d is 1.

3=1

This actually means unidentified because 3 does not equal 1.

Now let's see if Elena's solution.

Subtract 2.5d from both sides.

7.5d minus 2.5d equals 5d.

2.5d minus 2.5d equals 0.

5d=0.

d=0.

The actual answer is unidentified because 7.5d can never equal 2.5d.

I'll prove it to you.

If d is 1, then you'll get 7.5=2.5, which is not right.

So only Lin's solution is correct.

(In your explanation don't use the word "we" or "they" or "I" and I'm doing this so you can actually do work instead of asking and copy and pasting ☺)

Lol tryna get people attention

Step-by-step explanation:

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9