4.2v+6.4=40

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Solution for 4.2v+6.4=40 equation: 


Simplifying
4.2v + 6.4 = 40

Reorder the terms:
6.4 + 4.2v = 40

Solving
6.4 + 4.2v = 40

Solving for variable 'v'.

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

Add '-6.4' to each side of the equation.
6.4 + -6.4 + 4.2v = 40 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + 4.2v = 40 + -6.4
4.2v = 40 + -6.4

Combine like terms: 40 + -6.4 = 33.6
4.2v = 33.6

Divide each side by '4.2'.
v = 8

Simplifying
v = 8

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