Give a sure ) 30 pts

to solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x?

6x + 5y = 2

4x + 2y = 8

a) subtract 2 times the second equation from 3 times the first equation

b) subtract 3 times the second equation from 2 times the first equation

c) subtract 5 times the second equation from 2 times the first equation

d) subtract 2 times the second equation from 5 times the first equation

C)subtract 5 times the second equation from 2 times the first equation

Step-by-step explanation:

We want to eliminate the y variable so the coefficients have to be the same and opposite

6x + 5y = 2  

4x + 2y = 8

Multiply the first equation by 2 and the second equation by 5.  Then subtract the second equation from the first

2(6x + 5y) = 2*2

12x +10y = 4  

5( 4x + 2y) = 8*5

20x + 10y = 40

12x +10y = 4  

-( 20x + 10y = 40)

-8x = -36

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )