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Do not do #1 but plz answer the rest
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2. 3x - 5y = -2

   x + 3y = 4

   Let us multiply equation 2 by three, so we can use the elimination method.

   3x + 9y = 12

   Now, let us subtract equation 1 from equation 2.

   3x + 9y - 3x + 5y = 12 + 2

   14y = 14

   y = 1

   Let us substitute this value of y in equation 2.

   x + 3(1) = 4

   x = 4 - 3

   x = 1

3. -3x + 3y = -6

   6x + 4y = 42

   Let us multiply equation 1 by 2, so we can use the elimination method.

   -6x + 6y = -12

   Let us now add equations 1 and 2, so as to eliminate x.

   6x + 4y -6x + 6y = 42 - 12

   10y = 30

   y = 3

   Let us now substitute this value of y in equation 1, so as to find x.

   -3x + 3(3) = -6

   -3x + 9 = -6

   -3x = -15

   3x = 15

   x = 5

4. 12x + 4y = 20

   2x - 2y = -2

   Let us multiply equation 2 by 2, so as to use the elimination method.

   4x - 4y = -4

   Let us now add equations 1 and 2, so as to eliminate y.

   4x - 4y + 12x + 4y = -2 + 20

   16x = 18

   x = = = 1.125

   Let us substitute this value of x in equation 2, so as to find y.

   2(9/8) -2y = -2

   9/4 - 2y = -2

   -2y = -2 - 9/4

   2y = 17/4

   y = = 2.125

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