21(19-x)=15(5x-1)

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Solution for 21(19-x)=15(5x-1) equation:


Simplifying
21(19 + -1x) = 15(5x + -1)
(19 * 21 + -1x * 21) = 15(5x + -1)
(399 + -21x) = 15(5x + -1)

Reorder the terms:
399 + -21x = 15(-1 + 5x)
399 + -21x = (-1 * 15 + 5x * 15)
399 + -21x = (-15 + 75x)

Solving
399 + -21x = -15 + 75x

Solving for variable 'x'.

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

Add '-75x' to each side of the equation.
399 + -21x + -75x = -15 + 75x + -75x

Combine like terms: -21x + -75x = -96x
399 + -96x = -15 + 75x + -75x

Combine like terms: 75x + -75x = 0
399 + -96x = -15 + 0
399 + -96x = -15

Add '-399' to each side of the equation.
399 + -399 + -96x = -15 + -399

Combine like terms: 399 + -399 = 0
0 + -96x = -15 + -399
-96x = -15 + -399

Combine like terms: -15 + -399 = -414
-96x = -414

Divide each side by '-96'.
x = 4.3125

Simplifying
x = 4.3125

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