Question

x + y = 4
2x + 3y = 0

Answer 1

You need to subtract the equations.

Answer 2

But, before you do that you will have to multiply one equation.

Answer 3

Do you want to cancel out x or y?

Answer 4

or solve one for each variable and substitute or create a coefficient matrix. Please decide which you prefer

Answer 5

Yes, you couls also use substitution; it's easier.

Answer 6

use 1st equation:
x=4-y

Answer 7

plug it into 2nd equation:

2x+3y=0

Answer 8

2(4-y)+3y=0

Answer 9

@GreenCat please allow @loveeaj22 to do the problem

Answer 10

yes sir

Answer 11

the next part is simple. give it a try.

Answer 12

yes ma'am*

Answer 13

so i just plug in numbers for y and 3

Answer 14

@GreenCat

Answer 15

No, you do not have any numbers to plug in. You need to solve for y

Answer 16

2(4-y)+3y=0

multiply the 2 into the parenthesis.

Answer 17

2x4=8-y ?

Answer 18

please show us how you arrived there

Answer 19

no wait i have the answer x=12 and y=-8
here ill check it for you (2x12)+ (3x-8)=0
12+-8=4

Answer 20

i multiplied 2 on both sides and added it up then i pluged it into the first equation to check it @FibonacciChick666

Answer 21

uhm well your check is correct, it works, but I still do not understand how you arrived at that point.

Answer 22

Why did you multiply 2 on both sides?

Answer 23

because i thought that was what @GreenCat said but i guess i was wrong sorry !

Answer 24

Oops no!

2(4-y)+3y=0
^
This 2 should be multiplied with 4-y