5(x+21)=8x

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Solution for 5(x+21)=8x equation:


Simplifying
5(x + 21) = 8x

Reorder the terms:
5(21 + x) = 8x
(21 * 5 + x * 5) = 8x
(105 + 5x) = 8x

Solving
105 + 5x = 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.
105 + 5x + -8x = 8x + -8x

Combine like terms: 5x + -8x = -3x
105 + -3x = 8x + -8x

Combine like terms: 8x + -8x = 0
105 + -3x = 0

Add '-105' to each side of the equation.
105 + -105 + -3x = 0 + -105

Combine like terms: 105 + -105 = 0
0 + -3x = 0 + -105
-3x = 0 + -105

Combine like terms: 0 + -105 = -105
-3x = -105

Divide each side by '-3'.
x = 35

Simplifying
x = 35

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