Answer:
1. Solution
2. Solution
3. Not a Solution
4. Solution
5. Not a Solution
Step-by-step explanation:
1. (5,3) means x = 5, y = 3
x - y = 2 x + y = 8
5 - 3 = 2 5 + 3 = 8
2 = 2 8 = 8
2. x = 1, y = 2
3x - y = 1 2x + 3y = 8
3(1) - 2 = 1 2(1) + 3(2) = 8
3 - 2 = 1 2 + 6 = 8
1 = 1 8 = 8
3. x = -1, y = 7
4x + y = 3 2x - 3 = y
4(-1) + 7 = 3 2(-1) - 3 = 7
-4 + 7 = 3 -2 - 3 = 7
3 = 3 -5 = 7
4. x = -5, y = -2
3x = 4y -7 2x = 5y
3(-5) = 4(-2) - 7 2(-5) = 5(-2)
-15 = -8 - 7 -10 = -10
15 = 15
5. x = -3, y = 2
x + 4y = 1 y - x = 4
-3 + 4(2) = 1 2 - (-3) = 4
-3 + 8 = 1 2 + 3 = 4
5 = 1 5 = 4
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Answers & Comments
Answer:
1. Solution
2. Solution
3. Not a Solution
4. Solution
5. Not a Solution
Step-by-step explanation:
1. (5,3) means x = 5, y = 3
x - y = 2 x + y = 8
5 - 3 = 2 5 + 3 = 8
2 = 2 8 = 8
2. x = 1, y = 2
3x - y = 1 2x + 3y = 8
3(1) - 2 = 1 2(1) + 3(2) = 8
3 - 2 = 1 2 + 6 = 8
1 = 1 8 = 8
3. x = -1, y = 7
4x + y = 3 2x - 3 = y
4(-1) + 7 = 3 2(-1) - 3 = 7
-4 + 7 = 3 -2 - 3 = 7
3 = 3 -5 = 7
4. x = -5, y = -2
3x = 4y -7 2x = 5y
3(-5) = 4(-2) - 7 2(-5) = 5(-2)
-15 = -8 - 7 -10 = -10
15 = 15
5. x = -3, y = 2
x + 4y = 1 y - x = 4
-3 + 4(2) = 1 2 - (-3) = 4
-3 + 8 = 1 2 + 3 = 4
5 = 1 5 = 4