100=3x+5(x+4)

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Solution for 100=3x+5(x+4) equation:


Simplifying
100 = 3x + 5(x + 4)

Reorder the terms:
100 = 3x + 5(4 + x)
100 = 3x + (4 * 5 + x * 5)
100 = 3x + (20 + 5x)

Reorder the terms:
100 = 20 + 3x + 5x

Combine like terms: 3x + 5x = 8x
100 = 20 + 8x

Solving
100 = 20 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
100 + -8x = 20 + 8x + -8x

Combine like terms: 8x + -8x = 0
100 + -8x = 20 + 0
100 + -8x = 20

Add '-100' to each side of the equation.
100 + -100 + -8x = 20 + -100

Combine like terms: 100 + -100 = 0
0 + -8x = 20 + -100
-8x = 20 + -100

Combine like terms: 20 + -100 = -80
-8x = -80

Divide each side by '-8'.
x = 10

Simplifying
x = 10

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