-13=3.9+z

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Solution for -13=3.9+z equation:


Simplifying
-13 = 3.9 + z

Solving
-13 = 3.9 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
-13 + -1z = 3.9 + z + -1z

Combine like terms: z + -1z = 0
-13 + -1z = 3.9 + 0
-13 + -1z = 3.9

Add '13' to each side of the equation.
-13 + 13 + -1z = 3.9 + 13

Combine like terms: -13 + 13 = 0
0 + -1z = 3.9 + 13
-1z = 3.9 + 13

Combine like terms: 3.9 + 13 = 16.9
-1z = 16.9

Divide each side by '-1'.
z = -16.9

Simplifying
z = -16.9

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