0.3(3z+7)+7.9=0.4(3z-5)

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Solution for 0.3(3z+7)+7.9=0.4(3z-5) equation:


Simplifying
0.3(3z + 7) + 7.9 = 0.4(3z + -5)

Reorder the terms:
0.3(7 + 3z) + 7.9 = 0.4(3z + -5)
(7 * 0.3 + 3z * 0.3) + 7.9 = 0.4(3z + -5)
(2.1 + 0.9z) + 7.9 = 0.4(3z + -5)

Reorder the terms:
2.1 + 7.9 + 0.9z = 0.4(3z + -5)

Combine like terms: 2.1 + 7.9 = 10
10 + 0.9z = 0.4(3z + -5)

Reorder the terms:
10 + 0.9z = 0.4(-5 + 3z)
10 + 0.9z = (-5 * 0.4 + 3z * 0.4)
10 + 0.9z = (-2 + 1.2z)

Solving
10 + 0.9z = -2 + 1.2z

Solving for variable 'z'.

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

Add '-1.2z' to each side of the equation.
10 + 0.9z + -1.2z = -2 + 1.2z + -1.2z

Combine like terms: 0.9z + -1.2z = -0.3z
10 + -0.3z = -2 + 1.2z + -1.2z

Combine like terms: 1.2z + -1.2z = 0.0
10 + -0.3z = -2 + 0.0
10 + -0.3z = -2

Add '-10' to each side of the equation.
10 + -10 + -0.3z = -2 + -10

Combine like terms: 10 + -10 = 0
0 + -0.3z = -2 + -10
-0.3z = -2 + -10

Combine like terms: -2 + -10 = -12
-0.3z = -12

Divide each side by '-0.3'.
z = 40

Simplifying
z = 40

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