4(z-8)-2(z-9)=7(z-57)

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Solution for 4(z-8)-2(z-9)=7(z-57) equation:


Simplifying
4(z + -8) + -2(z + -9) = 7(z + -57)

Reorder the terms:
4(-8 + z) + -2(z + -9) = 7(z + -57)
(-8 * 4 + z * 4) + -2(z + -9) = 7(z + -57)
(-32 + 4z) + -2(z + -9) = 7(z + -57)

Reorder the terms:
-32 + 4z + -2(-9 + z) = 7(z + -57)
-32 + 4z + (-9 * -2 + z * -2) = 7(z + -57)
-32 + 4z + (18 + -2z) = 7(z + -57)

Reorder the terms:
-32 + 18 + 4z + -2z = 7(z + -57)

Combine like terms: -32 + 18 = -14
-14 + 4z + -2z = 7(z + -57)

Combine like terms: 4z + -2z = 2z
-14 + 2z = 7(z + -57)

Reorder the terms:
-14 + 2z = 7(-57 + z)
-14 + 2z = (-57 * 7 + z * 7)
-14 + 2z = (-399 + 7z)

Solving
-14 + 2z = -399 + 7z

Solving for variable 'z'.

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

Add '-7z' to each side of the equation.
-14 + 2z + -7z = -399 + 7z + -7z

Combine like terms: 2z + -7z = -5z
-14 + -5z = -399 + 7z + -7z

Combine like terms: 7z + -7z = 0
-14 + -5z = -399 + 0
-14 + -5z = -399

Add '14' to each side of the equation.
-14 + 14 + -5z = -399 + 14

Combine like terms: -14 + 14 = 0
0 + -5z = -399 + 14
-5z = -399 + 14

Combine like terms: -399 + 14 = -385
-5z = -385

Divide each side by '-5'.
z = 77

Simplifying
z = 77

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