-84=7(6+3z)

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Solution for -84=7(6+3z) equation:


Simplifying
-84 = 7(6 + 3z)
-84 = (6 * 7 + 3z * 7)
-84 = (42 + 21z)

Solving
-84 = 42 + 21z

Solving for variable 'z'.

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

Add '-21z' to each side of the equation.
-84 + -21z = 42 + 21z + -21z

Combine like terms: 21z + -21z = 0
-84 + -21z = 42 + 0
-84 + -21z = 42

Add '84' to each side of the equation.
-84 + 84 + -21z = 42 + 84

Combine like terms: -84 + 84 = 0
0 + -21z = 42 + 84
-21z = 42 + 84

Combine like terms: 42 + 84 = 126
-21z = 126

Divide each side by '-21'.
z = -6

Simplifying
z = -6

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