How to solve the simultaneous equation 3x+7y=26 4x+5y=13

I found:

x=-3

y=5

Explanation: I would multiply the first equation by −4 and the second by 3 and add together the two equations (in columns):

{−12x−28y=−104

{12x+15y=39

0−13y=−65

So: y=65/13=5

Substitute back this value into the first equation:

3x+7⋅5=26

3x=26−35=−9

x=−9/3=−3

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 : )

i can't solve unless i know what the line is

step-by-step explanation:

welcome to/p>