-[10z-(21z+7)]=7+(10z+3)

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Solution for -[10z-(21z+7)]=7+(10z+3) equation:


Simplifying
-1[10z + -1(21z + 7)] = 7 + (10z + 3)

Reorder the terms:
-1[10z + -1(7 + 21z)] = 7 + (10z + 3)
-1[10z + (7 * -1 + 21z * -1)] = 7 + (10z + 3)
-1[10z + (-7 + -21z)] = 7 + (10z + 3)

Reorder the terms:
-1[-7 + 10z + -21z] = 7 + (10z + 3)

Combine like terms: 10z + -21z = -11z
-1[-7 + -11z] = 7 + (10z + 3)
[-7 * -1 + -11z * -1] = 7 + (10z + 3)
[7 + 11z] = 7 + (10z + 3)

Reorder the terms:
7 + 11z = 7 + (3 + 10z)

Remove parenthesis around (3 + 10z)
7 + 11z = 7 + 3 + 10z

Combine like terms: 7 + 3 = 10
7 + 11z = 10 + 10z

Solving
7 + 11z = 10 + 10z

Solving for variable 'z'.

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

Add '-10z' to each side of the equation.
7 + 11z + -10z = 10 + 10z + -10z

Combine like terms: 11z + -10z = 1z
7 + 1z = 10 + 10z + -10z

Combine like terms: 10z + -10z = 0
7 + 1z = 10 + 0
7 + 1z = 10

Add '-7' to each side of the equation.
7 + -7 + 1z = 10 + -7

Combine like terms: 7 + -7 = 0
0 + 1z = 10 + -7
1z = 10 + -7

Combine like terms: 10 + -7 = 3
1z = 3

Divide each side by '1'.
z = 3

Simplifying
z = 3

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