15z^2+7=20z+7

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Solution for 15z^2+7=20z+7 equation:


Simplifying
15z2 + 7 = 20z + 7

Reorder the terms:
7 + 15z2 = 20z + 7

Reorder the terms:
7 + 15z2 = 7 + 20z

Add '-7' to each side of the equation.
7 + -7 + 15z2 = 7 + -7 + 20z

Combine like terms: 7 + -7 = 0
0 + 15z2 = 7 + -7 + 20z
15z2 = 7 + -7 + 20z

Combine like terms: 7 + -7 = 0
15z2 = 0 + 20z
15z2 = 20z

Solving
15z2 = 20z

Solving for variable 'z'.

Reorder the terms:
-20z + 15z2 = 20z + -20z

Combine like terms: 20z + -20z = 0
-20z + 15z2 = 0

Factor out the Greatest Common Factor (GCF), '5z'.
5z(-4 + 3z) = 0

Ignore the factor 5.

Subproblem 1

Set the factor 'z' equal to zero and attempt to solve: Simplifying z = 0 Solving z = 0 Move all terms containing z to the left, all other terms to the right. Simplifying z = 0

Subproblem 2

Set the factor '(-4 + 3z)' equal to zero and attempt to solve: Simplifying -4 + 3z = 0 Solving -4 + 3z = 0 Move all terms containing z to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 3z = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 3z = 0 + 4 3z = 0 + 4 Combine like terms: 0 + 4 = 4 3z = 4 Divide each side by '3'. z = 1.333333333 Simplifying z = 1.333333333

Solution

z = {0, 1.333333333}

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