6.1(4.5+7.5)=a

Solution for 6.1(4.5+7.5)=a equation:

Simplifying
6.1(4.5 + 7.5) = a

Combine like terms: 4.5 + 7.5 = 12
6.1(12) = a

Multiply 6.1 * 12
73.2 = a

Solving
73.2 = a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
73.2 + -1a = a + -1a

Combine like terms: a + -1a = 0
73.2 + -1a = 0

Add '-73.2' to each side of the equation.
73.2 + -73.2 + -1a = 0 + -73.2

Combine like terms: 73.2 + -73.2 = 0.0
0.0 + -1a = 0 + -73.2
-1a = 0 + -73.2

Combine like terms: 0 + -73.2 = -73.2
-1a = -73.2

Divide each side by '-1'.
a = 73.2

Simplifying
a = 73.2