3+4(z+5)=21

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Solution for 3+4(z+5)=21 equation:


Simplifying
3 + 4(z + 5) = 21

Reorder the terms:
3 + 4(5 + z) = 21
3 + (5 * 4 + z * 4) = 21
3 + (20 + 4z) = 21

Combine like terms: 3 + 20 = 23
23 + 4z = 21

Solving
23 + 4z = 21

Solving for variable 'z'.

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

Add '-23' to each side of the equation.
23 + -23 + 4z = 21 + -23

Combine like terms: 23 + -23 = 0
0 + 4z = 21 + -23
4z = 21 + -23

Combine like terms: 21 + -23 = -2
4z = -2

Divide each side by '4'.
z = -0.5

Simplifying
z = -0.5

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