415=15x+20(x+5)

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Solution for 415=15x+20(x+5) equation:


Simplifying
415 = 15x + 20(x + 5)

Reorder the terms:
415 = 15x + 20(5 + x)
415 = 15x + (5 * 20 + x * 20)
415 = 15x + (100 + 20x)

Reorder the terms:
415 = 100 + 15x + 20x

Combine like terms: 15x + 20x = 35x
415 = 100 + 35x

Solving
415 = 100 + 35x

Solving for variable 'x'.

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

Add '-35x' to each side of the equation.
415 + -35x = 100 + 35x + -35x

Combine like terms: 35x + -35x = 0
415 + -35x = 100 + 0
415 + -35x = 100

Add '-415' to each side of the equation.
415 + -415 + -35x = 100 + -415

Combine like terms: 415 + -415 = 0
0 + -35x = 100 + -415
-35x = 100 + -415

Combine like terms: 100 + -415 = -315
-35x = -315

Divide each side by '-35'.
x = 9

Simplifying
x = 9

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