66-2x=7x+21

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Solution for 66-2x=7x+21 equation:


Simplifying
66 + -2x = 7x + 21

Reorder the terms:
66 + -2x = 21 + 7x

Solving
66 + -2x = 21 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
66 + -2x + -7x = 21 + 7x + -7x

Combine like terms: -2x + -7x = -9x
66 + -9x = 21 + 7x + -7x

Combine like terms: 7x + -7x = 0
66 + -9x = 21 + 0
66 + -9x = 21

Add '-66' to each side of the equation.
66 + -66 + -9x = 21 + -66

Combine like terms: 66 + -66 = 0
0 + -9x = 21 + -66
-9x = 21 + -66

Combine like terms: 21 + -66 = -45
-9x = -45

Divide each side by '-9'.
x = 5

Simplifying
x = 5

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