21x-15=20x+16-1

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Solution for 21x-15=20x+16-1 equation:


Simplifying
21x + -15 = 20x + 16 + -1

Reorder the terms:
-15 + 21x = 20x + 16 + -1

Reorder the terms:
-15 + 21x = 16 + -1 + 20x

Combine like terms: 16 + -1 = 15
-15 + 21x = 15 + 20x

Solving
-15 + 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.
-15 + 21x + -20x = 15 + 20x + -20x

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

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

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

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

Combine like terms: 15 + 15 = 30
1x = 30

Divide each side by '1'.
x = 30

Simplifying
x = 30

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