9=4x+15

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Solution for 9=4x+15 equation:


Simplifying
9 = 4x + 15

Reorder the terms:
9 = 15 + 4x

Solving
9 = 15 + 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.
9 + -4x = 15 + 4x + -4x

Combine like terms: 4x + -4x = 0
9 + -4x = 15 + 0
9 + -4x = 15

Add '-9' to each side of the equation.
9 + -9 + -4x = 15 + -9

Combine like terms: 9 + -9 = 0
0 + -4x = 15 + -9
-4x = 15 + -9

Combine like terms: 15 + -9 = 6
-4x = 6

Divide each side by '-4'.
x = -1.5

Simplifying
x = -1.5

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