6-(3-x)=21-3.5x

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Solution for 6-(3-x)=21-3.5x equation:


Simplifying
6 + -1(3 + -1x) = 21 + -3.5x
6 + (3 * -1 + -1x * -1) = 21 + -3.5x
6 + (-3 + 1x) = 21 + -3.5x

Combine like terms: 6 + -3 = 3
3 + 1x = 21 + -3.5x

Solving
3 + 1x = 21 + -3.5x

Solving for variable 'x'.

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

Add '3.5x' to each side of the equation.
3 + 1x + 3.5x = 21 + -3.5x + 3.5x

Combine like terms: 1x + 3.5x = 4.5x
3 + 4.5x = 21 + -3.5x + 3.5x

Combine like terms: -3.5x + 3.5x = 0.0
3 + 4.5x = 21 + 0.0
3 + 4.5x = 21

Add '-3' to each side of the equation.
3 + -3 + 4.5x = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 4.5x = 21 + -3
4.5x = 21 + -3

Combine like terms: 21 + -3 = 18
4.5x = 18

Divide each side by '4.5'.
x = 4

Simplifying
x = 4

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