-2[5-(2+1)]-4=2(3-z)

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Solution for -2[5-(2+1)]-4=2(3-z) equation:


Simplifying
-2[5 + -1(2 + 1)] + -4 = 2(3 + -1z)

Combine like terms: 2 + 1 = 3
-2[5 + -1(3)] + -4 = 2(3 + -1z)

Multiply -1 * 3
-2[5 + -3] + -4 = 2(3 + -1z)

Combine like terms: 5 + -3 = 2
-2[2] + -4 = 2(3 + -1z)

Multiply -2 * 2
-4 + -4 = 2(3 + -1z)

Combine like terms: -4 + -4 = -8
-8 = 2(3 + -1z)
-8 = (3 * 2 + -1z * 2)
-8 = (6 + -2z)

Solving
-8 = 6 + -2z

Solving for variable 'z'.

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

Add '2z' to each side of the equation.
-8 + 2z = 6 + -2z + 2z

Combine like terms: -2z + 2z = 0
-8 + 2z = 6 + 0
-8 + 2z = 6

Add '8' to each side of the equation.
-8 + 8 + 2z = 6 + 8

Combine like terms: -8 + 8 = 0
0 + 2z = 6 + 8
2z = 6 + 8

Combine like terms: 6 + 8 = 14
2z = 14

Divide each side by '2'.
z = 7

Simplifying
z = 7

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