66-5x=10x+21

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Solution for 66-5x=10x+21 equation:


Simplifying
66 + -5x = 10x + 21

Reorder the terms:
66 + -5x = 21 + 10x

Solving
66 + -5x = 21 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
66 + -5x + -10x = 21 + 10x + -10x

Combine like terms: -5x + -10x = -15x
66 + -15x = 21 + 10x + -10x

Combine like terms: 10x + -10x = 0
66 + -15x = 21 + 0
66 + -15x = 21

Add '-66' to each side of the equation.
66 + -66 + -15x = 21 + -66

Combine like terms: 66 + -66 = 0
0 + -15x = 21 + -66
-15x = 21 + -66

Combine like terms: 21 + -66 = -45
-15x = -45

Divide each side by '-15'.
x = 3

Simplifying
x = 3

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