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Setler79 [48]
3 years ago
9

3. Find a solution to the following system of equations. -3x + 3y = -9 -3x + y = 7

Mathematics
1 answer:
Alex Ar [27]3 years ago
3 0

Answer:

x = 5

y = 2

Step-by-step explanation:

-3x + 3y = -9

3y = 3x - 9

Equation 1. <em><u>y = x - 3</u></em>

-3x + y = 7

Equation 2. <u><em>y = 3x + 7</em></u>

So, put number 1 equation to number 2's y :

x - 3 = 3x + 7

x -3x = 7 + 3

-2x = 10

2x = 10

x = 10/2

x = 5

And, put x, which is 5 , to the any equation to figure out the y.

This time, I'll use equation number 1.

y = 5 - 3

y = 2

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