100[0.07(z+4)]=

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Solution for 100[0.07(z+4)]= equation:


Simplifying
100[0.07(z + 4)] = 0

Reorder the terms:
100[0.07(4 + z)] = 0
100[(4 * 0.07 + z * 0.07)] = 0
100[(0.28 + 0.07z)] = 0
[0.28 * 100 + 0.07z * 100] = 0
[28 + 7z] = 0

Solving
28 + 7z = 0

Solving for variable 'z'.

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

Add '-28' to each side of the equation.
28 + -28 + 7z = 0 + -28

Combine like terms: 28 + -28 = 0
0 + 7z = 0 + -28
7z = 0 + -28

Combine like terms: 0 + -28 = -28
7z = -28

Divide each side by '7'.
z = -4

Simplifying
z = -4

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