3x=(5*3)+(2*3)+(5*4x)+(2*4x)

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Solution for 3x=(5*3)+(2*3)+(5*4x)+(2*4x) equation: 


Simplifying
3x = (5 * 3) + (2 * 3) + (5 * 4x) + (2 * 4x)

Multiply 5 * 3
3x = (15) + (2 * 3) + (5 * 4x) + (2 * 4x)
3x = 15 + (2 * 3) + (5 * 4x) + (2 * 4x)

Multiply 2 * 3
3x = 15 + (6) + (5 * 4x) + (2 * 4x)
3x = 15 + 6 + (5 * 4x) + (2 * 4x)

Multiply 5 * 4
3x = 15 + 6 + (20x) + (2 * 4x)

Multiply 2 * 4
3x = 15 + 6 + (20x) + (8x)

Combine like terms: 15 + 6 = 21
3x = 21 + (20x) + (8x)

Combine like terms: (20x) + (8x) = 28x
3x = 21 + 28x

Solving
3x = 21 + 28x

Solving for variable 'x'.

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

Add '-28x' to each side of the equation.
3x + -28x = 21 + 28x + -28x

Combine like terms: 3x + -28x = -25x
-25x = 21 + 28x + -28x

Combine like terms: 28x + -28x = 0
-25x = 21 + 0
-25x = 21

Divide each side by '-25'.
x = -0.84

Simplifying
x = -0.84

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