(3.15)(2.4)=r

Solution for (3.15)(2.4)=r equation:

Simplifying
(3.15)(2.4) = r

Multiply 3.15 * 2.4
7.56 = r

Solving
7.56 = r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
7.56 + -1r = r + -1r

Combine like terms: r + -1r = 0
7.56 + -1r = 0

Add '-7.56' to each side of the equation.
7.56 + -7.56 + -1r = 0 + -7.56

Combine like terms: 7.56 + -7.56 = 0.00
0.00 + -1r = 0 + -7.56
-1r = 0 + -7.56

Combine like terms: 0 + -7.56 = -7.56
-1r = -7.56

Divide each side by '-1'.
r = 7.56

Simplifying
r = 7.56