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Vaselesa [24]
3 years ago
15

PLEEEASE HELLLLP!!!!!!! If x+7=2y and y=2x−1, what is the value of y?

Mathematics
1 answer:
viktelen [127]3 years ago
6 0

Answer:

13

Step-by-step explanation:

We can add 1 to both sides of the second equation and divide by 2 to get

x = (y-1)/2

We can then substitute x in the first equation to get

(y-1)/2 + 7 = 2y

Multiply by 2

y-1 + 14 = 2y

Subtract y and combine like terms

y = 13

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3x - 2(2x - 5) = 2(x + 3) - 8
nataly862011 [7]

Answer:

x = 4

Step-by-step explanation:

Hello!

We can solve for x by expanding the parentheses and isolating x.

<h3>Solve for x</h3>
  • 3x - 2(2x - 5) = 2(x + 3)-8
  • 3x - 4x + 10 = 2x + 6 - 8
  • -x + 10 = 2x - 2
  • 10 = 3x - 2
  • 12 = 3x
  • x = 4

The value of x is 4.

3 0
2 years ago
Last month Kim trained 3 times as many dogs as cats.
Lisa [10]

Answer:

8

Step-by-step explanation:

dog=3x

cat=x

3x+x=32

4x=32

4/4

32/4

x=8

3(8)=24

x=8

So she trained 24 dogs and 8 cats

6 0
2 years ago
What is an algebraic expression for 58 less than a number n?
Korvikt [17]

Answer:

n-58

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
I need help with this
sergejj [24]

Answer:

20

Step-by-step explanation:

<em>5+5+5+5</em>

6 0
3 years ago
Identify the variables, the constant, the coefficients, and the exponents in the algebraic expression: 5x + 3y^{2} + 4. (The 2 i
blsea [12.9K]
The variables are: x, y
The constant is: 4
The coefficients are: 5, 3
The exponent is: y^2
5 0
3 years ago
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