8x+21=4x-3

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Solution for 8x+21=4x-3 equation:


Simplifying
8x + 21 = 4x + -3

Reorder the terms:
21 + 8x = 4x + -3

Reorder the terms:
21 + 8x = -3 + 4x

Solving
21 + 8x = -3 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
21 + 8x + -4x = -3 + 4x + -4x

Combine like terms: 8x + -4x = 4x
21 + 4x = -3 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + 4x = -3 + 0
21 + 4x = -3

Add '-21' to each side of the equation.
21 + -21 + 4x = -3 + -21

Combine like terms: 21 + -21 = 0
0 + 4x = -3 + -21
4x = -3 + -21

Combine like terms: -3 + -21 = -24
4x = -24

Divide each side by '4'.
x = -6

Simplifying
x = -6

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