9x(x+7)=4x+28

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Solution for 9x(x+7)=4x+28 equation: 


Simplifying
9x(x + 7) = 4x + 28

Reorder the terms:
9x(7 + x) = 4x + 28
(7 * 9x + x * 9x) = 4x + 28
(63x + 9x2) = 4x + 28

Reorder the terms:
63x + 9x2 = 28 + 4x

Solving
63x + 9x2 = 28 + 4x

Solving for variable 'x'.

Reorder the terms:
-28 + 63x + -4x + 9x2 = 28 + 4x + -28 + -4x

Combine like terms: 63x + -4x = 59x
-28 + 59x + 9x2 = 28 + 4x + -28 + -4x

Reorder the terms:
-28 + 59x + 9x2 = 28 + -28 + 4x + -4x

Combine like terms: 28 + -28 = 0
-28 + 59x + 9x2 = 0 + 4x + -4x
-28 + 59x + 9x2 = 4x + -4x

Combine like terms: 4x + -4x = 0
-28 + 59x + 9x2 = 0

Factor a trinomial.
(-7 + -1x)(4 + -9x) = 0


Subproblem 1
Set the factor '(-7 + -1x)' equal to zero and attempt to solve:

Simplifying
-7 + -1x = 0

Solving
-7 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '7' to each side of the equation.
-7 + 7 + -1x = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -1x = 0 + 7
-1x = 0 + 7

Combine like terms: 0 + 7 = 7
-1x = 7

Divide each side by '-1'.
x = -7

Simplifying
x = -7

Subproblem 2
Set the factor '(4 + -9x)' equal to zero and attempt to solve:

Simplifying
4 + -9x = 0

Solving
4 + -9x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-4' to each side of the equation.
4 + -4 + -9x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -9x = 0 + -4
-9x = 0 + -4

Combine like terms: 0 + -4 = -4
-9x = -4

Divide each side by '-9'.
x = 0.4444444444

Simplifying
x = 0.4444444444
Solution
x = {-7, 0.4444444444}

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