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3 years ago

Solve for X: 39 - 7x = -4 (7x + 7) = 4

Mathematics

2 answers:

Svetlanka [38]3 years ago

6 0

Answer:

Simplifying

39 + -7x = -4(7x + 7) + 4

Reorder terms

39 + -7x = -4(7 + 7x) + 4

39 + -7x = (7 * -4 + 7x * -4) + 4

39 + -7x = (-28 + -28x) + 4

Reorder the terms

39 + -7x = -28 + 4 + -28x

Combine like terms -28 + 4 = -24

39 + -7x = -24 + -28x

Solving

39 + -7x = -24 + -28x

Solve for variable x all terms x left, all others right.

Add '28x' to each side of the equation.

39 + -7x + 28x = -24 + -28x + 28x

Combine like terms -7x + 28x = 21x

39 + 21x = -24 + -28x + 28x

Combine like terms -28x + 28x = 0

39 + 21x = -24 + 0

39 + 21x = -24

Add '-39' to each side of the equation.

39 + -39 + 21x = -24 + -39

Combine like terms: 39 + -39 = 0

0 + 21x = -24 + -39

21x = -24 + -39

Combine like terms -24 + -39 = -63

21x = -63

Divide each side by 21

x = -3

Simplifying

x = -3

gtnhenbr [62]3 years ago

4 0

Subtract 39 from both sides

-7x = -4 - 39

Simplify -4 - 39 to -43

-7x = -43

Divide both sides by -7

x = -43/-7

Two negative make a positive

<em>For the second equation;</em>

Simplify brackets

7x + 7 = 4

Subtract 7 from both sides

7x = 4 - 7

Simplify 4 - 7 to -3

7x = -3

Divide both sides by 7

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Answer:

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Step-by-step explanation:

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Foil (x+1)^2

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Substitute this back in

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Distribute

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SInce you need 1.5 feet of overhang, add 3 feet to each axis dimension 1.5 on each side):

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We might choose to write a recursive formula rather than an explicit formula to define a sequence because (D) the sequence is strictly geometric.

<h3>What is a sequence?</h3>

A sequence in mathematics is an enumerated collection of items in which repetitions are permitted and order is important. It, like a set, has members (also called elements, or terms).
The length of the series is defined as the number of items (which could be infinite).
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Formally, a sequence can be defined as a function from natural numbers (the sequence's places) to the elements at each point.
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Recursive formulas are commonly used to compute the nth term of a sequence, where a(n) is the sum of all the preceding values.

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Therefore, we might choose to write a recursive formula rather than an explicit formula to define a sequence because (D) the sequence is strictly geometric.

Know more about sequences here:

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