(3x+5)(x+5)=3x^2+185

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Solution for (3x+5)(x+5)=3x^2+185 equation:


Simplifying
(3x + 5)(x + 5) = 3x2 + 185

Reorder the terms:
(5 + 3x)(x + 5) = 3x2 + 185

Reorder the terms:
(5 + 3x)(5 + x) = 3x2 + 185

Multiply (5 + 3x) * (5 + x)
(5(5 + x) + 3x * (5 + x)) = 3x2 + 185
((5 * 5 + x * 5) + 3x * (5 + x)) = 3x2 + 185
((25 + 5x) + 3x * (5 + x)) = 3x2 + 185
(25 + 5x + (5 * 3x + x * 3x)) = 3x2 + 185
(25 + 5x + (15x + 3x2)) = 3x2 + 185

Combine like terms: 5x + 15x = 20x
(25 + 20x + 3x2) = 3x2 + 185

Reorder the terms:
25 + 20x + 3x2 = 185 + 3x2

Add '-3x2' to each side of the equation.
25 + 20x + 3x2 + -3x2 = 185 + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
25 + 20x + 0 = 185 + 3x2 + -3x2
25 + 20x = 185 + 3x2 + -3x2

Combine like terms: 3x2 + -3x2 = 0
25 + 20x = 185 + 0
25 + 20x = 185

Solving
25 + 20x = 185

Solving for variable 'x'.

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

Add '-25' to each side of the equation.
25 + -25 + 20x = 185 + -25

Combine like terms: 25 + -25 = 0
0 + 20x = 185 + -25
20x = 185 + -25

Combine like terms: 185 + -25 = 160
20x = 160

Divide each side by '20'.
x = 8

Simplifying
x = 8

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