3z+9=4z

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Solution for 3z+9=4z equation:


Simplifying
3z + 9 = 4z

Reorder the terms:
9 + 3z = 4z

Solving
9 + 3z = 4z

Solving for variable 'z'.

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

Add '-4z' to each side of the equation.
9 + 3z + -4z = 4z + -4z

Combine like terms: 3z + -4z = -1z
9 + -1z = 4z + -4z

Combine like terms: 4z + -4z = 0
9 + -1z = 0

Add '-9' to each side of the equation.
9 + -9 + -1z = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -1z = 0 + -9
-1z = 0 + -9

Combine like terms: 0 + -9 = -9
-1z = -9

Divide each side by '-1'.
z = 9

Simplifying
z = 9

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