(3x+1)(x+1)=7(x+1)

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Solution for (3x+1)(x+1)=7(x+1) equation:


Simplifying
(3x + 1)(x + 1) = 7(x + 1)

Reorder the terms:
(1 + 3x)(x + 1) = 7(x + 1)

Reorder the terms:
(1 + 3x)(1 + x) = 7(x + 1)

Multiply (1 + 3x) * (1 + x)
(1(1 + x) + 3x * (1 + x)) = 7(x + 1)
((1 * 1 + x * 1) + 3x * (1 + x)) = 7(x + 1)
((1 + 1x) + 3x * (1 + x)) = 7(x + 1)
(1 + 1x + (1 * 3x + x * 3x)) = 7(x + 1)
(1 + 1x + (3x + 3x2)) = 7(x + 1)

Combine like terms: 1x + 3x = 4x
(1 + 4x + 3x2) = 7(x + 1)

Reorder the terms:
1 + 4x + 3x2 = 7(1 + x)
1 + 4x + 3x2 = (1 * 7 + x * 7)
1 + 4x + 3x2 = (7 + 7x)

Solving
1 + 4x + 3x2 = 7 + 7x

Solving for variable 'x'.

Reorder the terms:
1 + -7 + 4x + -7x + 3x2 = 7 + 7x + -7 + -7x

Combine like terms: 1 + -7 = -6
-6 + 4x + -7x + 3x2 = 7 + 7x + -7 + -7x

Combine like terms: 4x + -7x = -3x
-6 + -3x + 3x2 = 7 + 7x + -7 + -7x

Reorder the terms:
-6 + -3x + 3x2 = 7 + -7 + 7x + -7x

Combine like terms: 7 + -7 = 0
-6 + -3x + 3x2 = 0 + 7x + -7x
-6 + -3x + 3x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
-6 + -3x + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-2 + -1x + x2) = 0

Factor a trinomial.
3((-1 + -1x)(2 + -1x)) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-1 + -1x)' equal to zero and attempt to solve: Simplifying -1 + -1x = 0 Solving -1 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + -1x = 0 + 1 Combine like terms: -1 + 1 = 0 0 + -1x = 0 + 1 -1x = 0 + 1 Combine like terms: 0 + 1 = 1 -1x = 1 Divide each side by '-1'. x = -1 Simplifying x = -1

Subproblem 2

Set the factor '(2 + -1x)' equal to zero and attempt to solve: Simplifying 2 + -1x = 0 Solving 2 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -1x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + -1x = 0 + -2 -1x = 0 + -2 Combine like terms: 0 + -2 = -2 -1x = -2 Divide each side by '-1'. x = 2 Simplifying x = 2

Solution

x = {-1, 2}

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