9=-5(4x+2)+21x

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Solution for 9=-5(4x+2)+21x equation:


Simplifying
9 = -5(4x + 2) + 21x

Reorder the terms:
9 = -5(2 + 4x) + 21x
9 = (2 * -5 + 4x * -5) + 21x
9 = (-10 + -20x) + 21x

Combine like terms: -20x + 21x = 1x
9 = -10 + 1x

Solving
9 = -10 + 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.
9 + -1x = -10 + 1x + -1x

Combine like terms: 1x + -1x = 0
9 + -1x = -10 + 0
9 + -1x = -10

Add '-9' to each side of the equation.
9 + -9 + -1x = -10 + -9

Combine like terms: 9 + -9 = 0
0 + -1x = -10 + -9
-1x = -10 + -9

Combine like terms: -10 + -9 = -19
-1x = -19

Divide each side by '-1'.
x = 19

Simplifying
x = 19

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