Solve each system by substitution. Show your work. 1) y = -3x - 1

y = 3x - 7

2) y = 7x + 16

y = 4x + 10

3) y = -3x - 5

y = 8x + 17

4) y = -2x + 4

y = x + 1

5) y = 6x + 8

y = 2x + 4

6) y = 7x + 7

2x - 4y = -2

7) -5x - 6y = -22

y = -7x + 16

8) -5x - y = 17

y = -6x - 22

9) y = 7x - 5 -8x + 3y = -2

10) y = 8x - 7 -7x - 7y = -14

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11) 4x - 3y = 19 -3x + y = -18

12) 7x + y = 0

7x - 7y = 0

13) x - y = 4

7x + 3y = -12

14) 5x + 7y = 7

x + 5y = 5

15) -6x - 6y = 0

5x + y = 8

16) -2x - 2y = 12 -7x + 7y = 0

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17) 6x - 3y = 6

8x - 5y = 8

18) -4x - 7y = -16

6x - y = -22

19) -4x - 5y = 16

5x + 7y = -23

20) -4x - 4y = -20

4x + 3y = 19