If you have 2y-2x=3
-2y+5x= -9
how do you solve it using elimination method?

x=2, y=5 or (2,5)

Step-by-step explanation:

The elimination method is adding or subtracting two equations from each other to get rid of a variable.

I am going to get rid of y first.

2y-2x=3

-2y+5x=3

When you use elimination to add and subtract, you get the equation:

3x=6

Simplify for:

x=2

There are two ways to find y. The easier way is to plug x=2 back into one of the original equations and solve, or you can use elimination again. To use elimination to find y:

First we have to make it so that our x's will add or subtract to 0 in the two original equations by multiplying.

5 * (2y-2x=3) = 10y-10x=15

2 * (-2y+5x=3) = -4y+10x=15

Adding those two equations together will give us:

6y=30

Simplify:

y=5

answer: answer

step-by-step explanation:

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations: