7x+9+3x+12=

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Solution for 7x+9+3x+12= equation:


Simplifying
7x + 9 + 3x + 12 = 0

Reorder the terms:
9 + 12 + 7x + 3x = 0

Combine like terms: 9 + 12 = 21
21 + 7x + 3x = 0

Combine like terms: 7x + 3x = 10x
21 + 10x = 0

Solving
21 + 10x = 0

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 10x = 0 + -21

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

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

Divide each side by '10'.
x = -2.1

Simplifying
x = -2.1

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