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3 years ago

5/7x-4=21 solve folve for x

Mathematics

2 answers:

Aleksandr-060686 [28]3 years ago

6 0

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

7*x-4-(21)=0

Solve : 7x-25 = 0

Add 25 to both sides of the equation :

7x = 25

Divide both sides of the equation by 7:

x = 25/7 = 3.571

Marysya12 [62]3 years ago

5 0

Answer:

Step-by-step explanation:

1. 5/7x - 4 = 21

2. Add 4 on both sides --> 5/7x = 25

3. Divide by 5/7 on each side

4. on the left it cancels out and you are left with ---> x = 35

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Find the percent of increase or decrease? 2.5y to 1.5y

horsena [70]

Answer:

From 2.5 y to 1.5 y there is a 40 % DECREASE in the value.

Step-by-step explanation:

Here, the initial value = 2.5 y

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3 years ago

What is the solution of the equation (4x + 3)^2 = 18?

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Step-by-step explanation:

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4 years ago

Read 2 more answers

Three polynomials are factored below, but some coefficients and constants are missing. All of the missing values of a, b, c, and

mariarad [96]

9514 1404 393

Answer:

(a, b, c, d) = (1, -4, 1, -2)
(a, b, c, d) = (1, -4, 1, 2)
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Step-by-step explanation:

Once you remove the common factor from the terms, you are looking for factors of the remaining constant term that have a sum equal to the coefficient of the linear term. These factors are the constants in the binomial factors.

1. 8 = (-4)(-2) ⇒ x^2 -6x +8 = (x -4)(x -2)

(a, b, c, d) = (1, -4, 1, -2)

2. -8 = (-4)(+2) ⇒ 3x^3 -6x^2 -24x = 3x(x -4)(x +2)

(a, b, c, d) = (1, -4, 1, 2)

3. -12 = (-4)(3) ⇒ 2x^2 -2x -24 = 2(x -4)(x +3) = (x -4)(2x +6)

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3 years ago