4(2x-1)-5(2x-3)=21

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Solution for 4(2x-1)-5(2x-3)=21 equation:


Simplifying
4(2x + -1) + -5(2x + -3) = 21

Reorder the terms:
4(-1 + 2x) + -5(2x + -3) = 21
(-1 * 4 + 2x * 4) + -5(2x + -3) = 21
(-4 + 8x) + -5(2x + -3) = 21

Reorder the terms:
-4 + 8x + -5(-3 + 2x) = 21
-4 + 8x + (-3 * -5 + 2x * -5) = 21
-4 + 8x + (15 + -10x) = 21

Reorder the terms:
-4 + 15 + 8x + -10x = 21

Combine like terms: -4 + 15 = 11
11 + 8x + -10x = 21

Combine like terms: 8x + -10x = -2x
11 + -2x = 21

Solving
11 + -2x = 21

Solving for variable 'x'.

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

Add '-11' to each side of the equation.
11 + -11 + -2x = 21 + -11

Combine like terms: 11 + -11 = 0
0 + -2x = 21 + -11
-2x = 21 + -11

Combine like terms: 21 + -11 = 10
-2x = 10

Divide each side by '-2'.
x = -5

Simplifying
x = -5

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