30-7z=3(10-7z)

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Solution for 30-7z=3(10-7z) equation:


Simplifying
30 + -7z = 3(10 + -7z)
30 + -7z = (10 * 3 + -7z * 3)
30 + -7z = (30 + -21z)

Add '-30' to each side of the equation.
30 + -30 + -7z = 30 + -30 + -21z

Combine like terms: 30 + -30 = 0
0 + -7z = 30 + -30 + -21z
-7z = 30 + -30 + -21z

Combine like terms: 30 + -30 = 0
-7z = 0 + -21z
-7z = -21z

Solving
-7z = -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.
-7z + 21z = -21z + 21z

Combine like terms: -7z + 21z = 14z
14z = -21z + 21z

Combine like terms: -21z + 21z = 0
14z = 0

Divide each side by '14'.
z = 0

Simplifying
z = 0

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