2+5(1-4z)=21

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Solution for 2+5(1-4z)=21 equation:


Simplifying
2 + 5(1 + -4z) = 21
2 + (1 * 5 + -4z * 5) = 21
2 + (5 + -20z) = 21

Combine like terms: 2 + 5 = 7
7 + -20z = 21

Solving
7 + -20z = 21

Solving for variable 'z'.

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

Add '-7' to each side of the equation.
7 + -7 + -20z = 21 + -7

Combine like terms: 7 + -7 = 0
0 + -20z = 21 + -7
-20z = 21 + -7

Combine like terms: 21 + -7 = 14
-20z = 14

Divide each side by '-20'.
z = -0.7

Simplifying
z = -0.7

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