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

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


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

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

Combine like terms: -20x + 21x = 1x
4 = -5 + 1x

Solving
4 = -5 + 1x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
4 + -1x = -5 + 1x + -1x

Combine like terms: 1x + -1x = 0
4 + -1x = -5 + 0
4 + -1x = -5

Add '-4' to each side of the equation.
4 + -4 + -1x = -5 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = -5 + -4
-1x = -5 + -4

Combine like terms: -5 + -4 = -9
-1x = -9

Divide each side by '-1'.
x = 9

Simplifying
x = 9

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