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8th Grade Mathematics
Name___________________________________
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Substitution- C (Neither equation solved for y)
Period____ Calculator #______
Solve each system by substitution.
1) x + 5 y = -15
-2 x + 5 y = 0
2) x + 3 y = 7
-3 x + 7 y = -21
3) 2 x - 2 y = -18
-5 x + y = 21
4) 6 x - 2 y = 6
-3 x + y = -3
5) -3 x - 8 y = -16
x - 6 y = -12
6) -5 x + y = -6
5x - y = 2
7) x + 5 y = 8
-3 x - 15 y = -4
8) -3 x - 3 y = 12
-4 x + y = 6
9) x - 6 y = -13
-3 x - 6 y = 15
10) -4 x + 3 y = 18
x + 8 y = 13
Worksheet by Kuta Software LLC
-1-
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11) - x - 3 y = 9
-8 x - 6 y = -18
12) 6 x + 4 y = -6
7 x + 2 y = -15
13) -3 x + 6 y = -6
3x - 6 y = 6
14) -3 x + 6 y = -6
2x - 7 y = 4
15) 6 x - 3 y = 9
8x - 5 y = 9
16) 4 x - 12 y = 8
-2 x + 6 y = 0
17) -7 x - 4 y = 21
-8 x - 3 y = 24
18) -4 x + 3 y = 17
y = -5
19) 3 x - 6 y = 15
9 x - 18 y = 45
20) -3 x - y = 6
-3 x - 3 y = 18
Worksheet by Kuta Software LLC
-2-
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8th Grade Mathematics
Name___________________________________
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Substitution- C (Neither equation solved for y)
Period____ Calculator #______
Solve each system by substitution.
1) x + 5 y = -15
-2 x + 5 y = 0
2) x + 3 y = 7
-3 x + 7 y = -21
(-5, -2)
(7 , 0)
3) 2 x - 2 y = -18
-5 x + y = 21
4) 6 x - 2 y = 6
-3 x + y = -3
(-3, 6)
5) -3 x - 8 y = -16
x - 6 y = -12
Infinite number of solutions
6) -5 x + y = -6
5x - y = 2
(0, 2)
7) x + 5 y = 8
-3 x - 15 y = -4
No solution
8) -3 x - 3 y = 12
-4 x + y = 6
(-2, -2)
No solution
9) x - 6 y = -13
-3 x - 6 y = 15
10) -4 x + 3 y = 18
x + 8 y = 13
(-7, 1)
(-3, 2)
Worksheet by Kuta Software LLC
-1-
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11) - x - 3 y = 9
-8 x - 6 y = -18
12) 6 x + 4 y = -6
7 x + 2 y = -15
(6, -5)
13) -3 x + 6 y = -6
3x - 6 y = 6
(-3, 3)
14) -3 x + 6 y = -6
2x - 7 y = 4
(2 , 0)
Infinite number of solutions
15) 6 x - 3 y = 9
8x - 5 y = 9
16) 4 x - 12 y = 8
-2 x + 6 y = 0
(3, 3)
17) -7 x - 4 y = 21
-8 x - 3 y = 24
No solution
18) -4 x + 3 y = 17
y = -5
(-3, 0)
19) 3 x - 6 y = 15
9 x - 18 y = 45
(-8, -5)
20) -3 x - y = 6
-3 x - 3 y = 18
(0, -6)
Infinite number of solutions
Worksheet by Kuta Software LLC
-2-
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