5x+45=12x-21

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Solution for 5x+45=12x-21 equation:


Simplifying
5x + 45 = 12x + -21

Reorder the terms:
45 + 5x = 12x + -21

Reorder the terms:
45 + 5x = -21 + 12x

Solving
45 + 5x = -21 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
45 + 5x + -12x = -21 + 12x + -12x

Combine like terms: 5x + -12x = -7x
45 + -7x = -21 + 12x + -12x

Combine like terms: 12x + -12x = 0
45 + -7x = -21 + 0
45 + -7x = -21

Add '-45' to each side of the equation.
45 + -45 + -7x = -21 + -45

Combine like terms: 45 + -45 = 0
0 + -7x = -21 + -45
-7x = -21 + -45

Combine like terms: -21 + -45 = -66
-7x = -66

Divide each side by '-7'.
x = 9.428571429

Simplifying
x = 9.428571429

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