0.3(2z+7)+7.9=0.5(2z-4)

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Solution for 0.3(2z+7)+7.9=0.5(2z-4) equation:


Simplifying
0.3(2z + 7) + 7.9 = 0.5(2z + -4)

Reorder the terms:
0.3(7 + 2z) + 7.9 = 0.5(2z + -4)
(7 * 0.3 + 2z * 0.3) + 7.9 = 0.5(2z + -4)
(2.1 + 0.6z) + 7.9 = 0.5(2z + -4)

Reorder the terms:
2.1 + 7.9 + 0.6z = 0.5(2z + -4)

Combine like terms: 2.1 + 7.9 = 10
10 + 0.6z = 0.5(2z + -4)

Reorder the terms:
10 + 0.6z = 0.5(-4 + 2z)
10 + 0.6z = (-4 * 0.5 + 2z * 0.5)
10 + 0.6z = (-2 + 1z)

Solving
10 + 0.6z = -2 + 1z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
10 + 0.6z + -1z = -2 + 1z + -1z

Combine like terms: 0.6z + -1z = -0.4z
10 + -0.4z = -2 + 1z + -1z

Combine like terms: 1z + -1z = 0
10 + -0.4z = -2 + 0
10 + -0.4z = -2

Add '-10' to each side of the equation.
10 + -10 + -0.4z = -2 + -10

Combine like terms: 10 + -10 = 0
0 + -0.4z = -2 + -10
-0.4z = -2 + -10

Combine like terms: -2 + -10 = -12
-0.4z = -12

Divide each side by '-0.4'.
z = 30

Simplifying
z = 30

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