Missing Part of the Question
- 9 + y + 4y - 2 - 3y; -2y + 7
- 5 + y - 2 - 6y + y; 8y + 3
- 2y + 7 + y - 2 + y; 4y + 5
Answer:
- 2y + 7 + y - 2 + y; 4y + 5
Step-by-step explanation:
Given
y = 3
Required
Which pair of expression are equal
To get the pair of expression that are equal; we simply substitute 3 for y in each of the expressions
3 (4 - y) -7 and 5 + 3y
<em>Substitute 3 for y in 3 (4 - y) -7</em>
This gives 3(4 - 3) -7
= 3(1) - 7
= 3 - 7
= -4
<em>Then Substitute 3 for y in 5 + 3y</em>
This gives 5 + 3(3)
= 5 + 9
= 14
-4 and 14 are not equal
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9 + y + 4y - 2 - 3y; -2y + 7
<em>Substitute 3 for y in </em>9 + y + 4y - 2 - 3y
This gives 9 + 3 + 4(3) - 2 - 3(3)
= 9 + 3 + 12 - 2 - 9
= 13
<em>Then Substitute 3 for y in -2y + 7</em>
This gives -2(3) + 7
= -6 + 7
= 1
13 and 1 are not equal
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5 + y - 2 - 6y + y; 8y + 3
<em>Substitute 3 for y in 5 + y - 2 - 6y + y</em>
This gives 5 + 3 - 2 - 6(3) + 3
= 5 + 3 - 2 - 18 + 3
= -9
<em>Then Substitute 3 for y in 8y + 3</em>
This gives 8(3) + 3
= 24 + 3
= 27
-9 and 27 are not equal
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2y + 7 + y - 2 + y; 4y + 5
<em>Substitute 3 for y in 2y + 7 + y - 2 + y</em>
This gives 2(3) + 7 + 3 - 2 + 3
= 6 + 7 + 3 - 2 + 3
= 17
<em>Then Substitute 3 for y in 4y + 5</em>
This gives 4(3) + 5
= 12 + 5
= 17
17 and 17 are equal
Hence, Option D is correct
