3(z-21)=39-3(z-4)

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Solution for 3(z-21)=39-3(z-4) equation:


Simplifying
3(z + -21) = 39 + -3(z + -4)

Reorder the terms:
3(-21 + z) = 39 + -3(z + -4)
(-21 * 3 + z * 3) = 39 + -3(z + -4)
(-63 + 3z) = 39 + -3(z + -4)

Reorder the terms:
-63 + 3z = 39 + -3(-4 + z)
-63 + 3z = 39 + (-4 * -3 + z * -3)
-63 + 3z = 39 + (12 + -3z)

Combine like terms: 39 + 12 = 51
-63 + 3z = 51 + -3z

Solving
-63 + 3z = 51 + -3z

Solving for variable 'z'.

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

Add '3z' to each side of the equation.
-63 + 3z + 3z = 51 + -3z + 3z

Combine like terms: 3z + 3z = 6z
-63 + 6z = 51 + -3z + 3z

Combine like terms: -3z + 3z = 0
-63 + 6z = 51 + 0
-63 + 6z = 51

Add '63' to each side of the equation.
-63 + 63 + 6z = 51 + 63

Combine like terms: -63 + 63 = 0
0 + 6z = 51 + 63
6z = 51 + 63

Combine like terms: 51 + 63 = 114
6z = 114

Divide each side by '6'.
z = 19

Simplifying
z = 19

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