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inysia [295]
4 years ago
14

Help me with this plzzzzzzzzz

Mathematics
2 answers:
yanalaym [24]4 years ago
6 0

Answer: x = 13 and y = -2

Step-by-step explanation:

You need to use the elimination method for each equation, so that means being able to cross them out by equaling them to 0. You can choose x value or the y value, since you need to do 2 things to the y value I will show you an easier way with the x value since it is equal to one in the top equation.

Looking at the bottom equation, you need to find a way to set the x equation to cross 2x out making it 0. Removing x from this, how can you make 2 end up being 0? Subtract 2 from it, but x is not -2 on the first equation, so you have to times everything in that equation by -2 to make x -2.

so basically,

-2(x + 3y = 7)

your new equation is

-2x -6y = -14

put your other equation under it to eliminate the x value finally.

-2x -6y = -14

2x + 2y = 6

so you only need to combine like terms. X is no longer included because x is eliminated.

-4y = 8

divide to find the value of y

Y = -2

plug your newly found equation in for y in the original equation (either one is fine.

x + 3(-2) = 7

x -6 = 7

add 6 to both sides

x = 13

Darya [45]4 years ago
5 0

Answer:

x=1, y=2

Step-by-step explanation:

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