20x+5x-20=21+4

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Solution for 20x+5x-20=21+4 equation:


Simplifying
20x + 5x + -20 = 21 + 4

Reorder the terms:
-20 + 20x + 5x = 21 + 4

Combine like terms: 20x + 5x = 25x
-20 + 25x = 21 + 4

Combine like terms: 21 + 4 = 25
-20 + 25x = 25

Solving
-20 + 25x = 25

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 25x = 25 + 20

Combine like terms: -20 + 20 = 0
0 + 25x = 25 + 20
25x = 25 + 20

Combine like terms: 25 + 20 = 45
25x = 45

Divide each side by '25'.
x = 1.8

Simplifying
x = 1.8

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