7z-3(z+5)=13

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Solution for 7z-3(z+5)=13 equation:


Simplifying
7z + -3(z + 5) = 13

Reorder the terms:
7z + -3(5 + z) = 13
7z + (5 * -3 + z * -3) = 13
7z + (-15 + -3z) = 13

Reorder the terms:
-15 + 7z + -3z = 13

Combine like terms: 7z + -3z = 4z
-15 + 4z = 13

Solving
-15 + 4z = 13

Solving for variable 'z'.

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

Add '15' to each side of the equation.
-15 + 15 + 4z = 13 + 15

Combine like terms: -15 + 15 = 0
0 + 4z = 13 + 15
4z = 13 + 15

Combine like terms: 13 + 15 = 28
4z = 28

Divide each side by '4'.
z = 7

Simplifying
z = 7

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