13x-4(2x-5)=21

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Solution for 13x-4(2x-5)=21 equation:


Simplifying
13x + -4(2x + -5) = 21

Reorder the terms:
13x + -4(-5 + 2x) = 21
13x + (-5 * -4 + 2x * -4) = 21
13x + (20 + -8x) = 21

Reorder the terms:
20 + 13x + -8x = 21

Combine like terms: 13x + -8x = 5x
20 + 5x = 21

Solving
20 + 5x = 21

Solving for variable 'x'.

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

Add '-20' to each side of the equation.
20 + -20 + 5x = 21 + -20

Combine like terms: 20 + -20 = 0
0 + 5x = 21 + -20
5x = 21 + -20

Combine like terms: 21 + -20 = 1
5x = 1

Divide each side by '5'.
x = 0.2

Simplifying
x = 0.2

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