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Elden [556K]
3 years ago
6

Evaluate 5x – 2y + (7x – y) for x = 7 and y = –2

Mathematics
2 answers:
Lynna [10]3 years ago
6 0

Answer:

90

Step-by-step explanation:

5x – 2y + (7x – y)

Combine like terms

12x -3y

Let x = 7 and y = -2

12(7) -3(-2)

84 +6

90

creativ13 [48]3 years ago
6 0

Answer:

90

Step-by-step explanation:

Hi there!

We are given this expression:

5x-2y+(7x-y) and we want to evaluate it if x=7 and y=-2

First, let's combine like terms, as that will make it easier for when we substitute the values into the expression

Open up the parentheses

5x-2y+7x-y

Combine like terms

12x-3y

Now substitute 7 as x and -2 as y into the expression

12(7)-3(-2)

Multiply

84+6

Add

<u>90</u>

Hope this helps!

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