9+12=4x+3

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Solution for 9+12=4x+3 equation:


Simplifying
9 + 12 = 4x + 3

Combine like terms: 9 + 12 = 21
21 = 4x + 3

Reorder the terms:
21 = 3 + 4x

Solving
21 = 3 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
21 + -4x = 3 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + -4x = 3 + 0
21 + -4x = 3

Add '-21' to each side of the equation.
21 + -21 + -4x = 3 + -21

Combine like terms: 21 + -21 = 0
0 + -4x = 3 + -21
-4x = 3 + -21

Combine like terms: 3 + -21 = -18
-4x = -18

Divide each side by '-4'.
x = 4.5

Simplifying
x = 4.5

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