13=-5(4x+1)+21

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Solution for 13=-5(4x+1)+21 equation:


Simplifying
13 = -5(4x + 1) + 21

Reorder the terms:
13 = -5(1 + 4x) + 21
13 = (1 * -5 + 4x * -5) + 21
13 = (-5 + -20x) + 21

Reorder the terms:
13 = -5 + 21 + -20x

Combine like terms: -5 + 21 = 16
13 = 16 + -20x

Solving
13 = 16 + -20x

Solving for variable 'x'.

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

Add '20x' to each side of the equation.
13 + 20x = 16 + -20x + 20x

Combine like terms: -20x + 20x = 0
13 + 20x = 16 + 0
13 + 20x = 16

Add '-13' to each side of the equation.
13 + -13 + 20x = 16 + -13

Combine like terms: 13 + -13 = 0
0 + 20x = 16 + -13
20x = 16 + -13

Combine like terms: 16 + -13 = 3
20x = 3

Divide each side by '20'.
x = 0.15

Simplifying
x = 0.15

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