51x=21x+90

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Solution for 51x=21x+90 equation: 


Simplifying
51x = 21x + 90

Reorder the terms:
51x = 90 + 21x

Solving
51x = 90 + 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
51x + -21x = 90 + 21x + -21x

Combine like terms: 51x + -21x = 30x
30x = 90 + 21x + -21x

Combine like terms: 21x + -21x = 0
30x = 90 + 0
30x = 90

Divide each side by '30'.
x = 3

Simplifying
x = 3

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