21x-10=5(4x+5)-10

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Solution for 21x-10=5(4x+5)-10 equation:


Simplifying
21x + -10 = 5(4x + 5) + -10

Reorder the terms:
-10 + 21x = 5(4x + 5) + -10

Reorder the terms:
-10 + 21x = 5(5 + 4x) + -10
-10 + 21x = (5 * 5 + 4x * 5) + -10
-10 + 21x = (25 + 20x) + -10

Reorder the terms:
-10 + 21x = 25 + -10 + 20x

Combine like terms: 25 + -10 = 15
-10 + 21x = 15 + 20x

Solving
-10 + 21x = 15 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
-10 + 21x + -20x = 15 + 20x + -20x

Combine like terms: 21x + -20x = 1x
-10 + 1x = 15 + 20x + -20x

Combine like terms: 20x + -20x = 0
-10 + 1x = 15 + 0
-10 + 1x = 15

Add '10' to each side of the equation.
-10 + 10 + 1x = 15 + 10

Combine like terms: -10 + 10 = 0
0 + 1x = 15 + 10
1x = 15 + 10

Combine like terms: 15 + 10 = 25
1x = 25

Divide each side by '1'.
x = 25

Simplifying
x = 25

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