.75(4.2)=v

Solution for .75(4.2)=v equation:

Simplifying
0.75(4.2) = v

Multiply 0.75 * 4.2
3.15 = v

Solving
3.15 = v

Solving for variable 'v'.

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

Add '-1v' to each side of the equation.
3.15 + -1v = v + -1v

Combine like terms: v + -1v = 0
3.15 + -1v = 0

Add '-3.15' to each side of the equation.
3.15 + -3.15 + -1v = 0 + -3.15

Combine like terms: 3.15 + -3.15 = 0.00
0.00 + -1v = 0 + -3.15
-1v = 0 + -3.15

Combine like terms: 0 + -3.15 = -3.15
-1v = -3.15

Divide each side by '-1'.
v = 3.15

Simplifying
v = 3.15