4(5z-1)-4(z+4)=9(z+1)

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Solution for 4(5z-1)-4(z+4)=9(z+1) equation:


Simplifying
4(5z + -1) + -4(z + 4) = 9(z + 1)

Reorder the terms:
4(-1 + 5z) + -4(z + 4) = 9(z + 1)
(-1 * 4 + 5z * 4) + -4(z + 4) = 9(z + 1)
(-4 + 20z) + -4(z + 4) = 9(z + 1)

Reorder the terms:
-4 + 20z + -4(4 + z) = 9(z + 1)
-4 + 20z + (4 * -4 + z * -4) = 9(z + 1)
-4 + 20z + (-16 + -4z) = 9(z + 1)

Reorder the terms:
-4 + -16 + 20z + -4z = 9(z + 1)

Combine like terms: -4 + -16 = -20
-20 + 20z + -4z = 9(z + 1)

Combine like terms: 20z + -4z = 16z
-20 + 16z = 9(z + 1)

Reorder the terms:
-20 + 16z = 9(1 + z)
-20 + 16z = (1 * 9 + z * 9)
-20 + 16z = (9 + 9z)

Solving
-20 + 16z = 9 + 9z

Solving for variable 'z'.

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

Add '-9z' to each side of the equation.
-20 + 16z + -9z = 9 + 9z + -9z

Combine like terms: 16z + -9z = 7z
-20 + 7z = 9 + 9z + -9z

Combine like terms: 9z + -9z = 0
-20 + 7z = 9 + 0
-20 + 7z = 9

Add '20' to each side of the equation.
-20 + 20 + 7z = 9 + 20

Combine like terms: -20 + 20 = 0
0 + 7z = 9 + 20
7z = 9 + 20

Combine like terms: 9 + 20 = 29
7z = 29

Divide each side by '7'.
z = 4.142857143

Simplifying
z = 4.142857143

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