4x-[2x-(3x-7)]+2x=21

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Solution for 4x-[2x-(3x-7)]+2x=21 equation:


Simplifying
4x + -1[2x + -1(3x + -7)] + 2x = 21

Reorder the terms:
4x + -1[2x + -1(-7 + 3x)] + 2x = 21
4x + -1[2x + (-7 * -1 + 3x * -1)] + 2x = 21
4x + -1[2x + (7 + -3x)] + 2x = 21

Reorder the terms:
4x + -1[7 + 2x + -3x] + 2x = 21

Combine like terms: 2x + -3x = -1x
4x + -1[7 + -1x] + 2x = 21
4x + [7 * -1 + -1x * -1] + 2x = 21
4x + [-7 + 1x] + 2x = 21

Reorder the terms:
-7 + 4x + 1x + 2x = 21

Combine like terms: 4x + 1x = 5x
-7 + 5x + 2x = 21

Combine like terms: 5x + 2x = 7x
-7 + 7x = 21

Solving
-7 + 7x = 21

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 7x = 21 + 7

Combine like terms: -7 + 7 = 0
0 + 7x = 21 + 7
7x = 21 + 7

Combine like terms: 21 + 7 = 28
7x = 28

Divide each side by '7'.
x = 4

Simplifying
x = 4

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