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balu736 [363]
2 years ago
10

What is 7x + 15 = 9x + 15 - 2x + 1 and how many solutions are there

Mathematics
2 answers:
RSB [31]2 years ago
5 0

Step-by-step explanation:

7x + 15 = 9x + 15 - 2x + 1

7x + 15 = 7x + 16

Bringing like terms on one side

7x - 7x = 16 - 15

x = 1

7x + 15 = 9x + 15 - 2x + 1

7x + 15 = 7x + 16

Bringing like terms on one side

15 - 16 = 7x - 7x

-1 = x

There are two solutions

Olin [163]2 years ago
5 0

Answer:

no solutions

Step-by-step explanation:

7x + 15 = 9x + 15 - 2x + 1

Combine like terms

7x+15 = 7x+16

Subtract 7x from each side

7x+15-7x = 7x+16-7x

15 =16

This is not a true statement so there are no solutions

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Mrs. Carter is ordering pizza for her math class. She will need to pay a $15 delivery fee and then $7 for each pizza she orders.
Natali [406]

Answer:

A) 7p+15

Step-by-step explanation:

To first start things off, we know she automatically has a fee of 15 dollars. No matter what, she must pay the 15 dollars!

Using this information, we know that so far we have: 15+

We also know that it costs 7 dollars for one pizza. If Mrs. Carter decides to buy more then just one pizza then how will we express it? We can express by writing 7x. The reason we have a x with the 7 is because x is the total amount of pizzas.\

Now we combine what we have.

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4 0
4 years ago
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<img src="https://tex.z-dn.net/?f=y%5E2%2B3y%2B2%3D0" id="TexFormula1" title="y^2+3y+2=0" alt="y^2+3y+2=0" align="absmiddle" cla
Semmy [17]

Answer:

y = - 2, y = - 1

Step-by-step explanation:

y² + 3y + 2 = 0

Consider the factors of the constant term (+ 2) which sum to give the coefficient of the y- term (+ 3)

The factors are + 2 and + 1 , since

2 × 1 = 2 and 2 + 1 = 3 , then

(y + 2)(y + 1) = 0

Equate each factor to zero and solve for y

y + 2 = 0 ⇒ y = - 2

y + 1 = 0 ⇒ y = - 1

5 0
3 years ago
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