(8*5)+(3*7)=k

Solution for (8*5)+(3*7)=k equation:

Simplifying
(8 * 5) + (3 * 7) = k

Multiply 8 * 5
(40) + (3 * 7) = k
40 + (3 * 7) = k

Multiply 3 * 7
40 + (21) = k
40 + 21 = k

Combine like terms: 40 + 21 = 61
61 = k

Solving
61 = k

Solving for variable 'k'.

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

Add '-1k' to each side of the equation.
61 + -1k = k + -1k

Combine like terms: k + -1k = 0
61 + -1k = 0

Add '-61' to each side of the equation.
61 + -61 + -1k = 0 + -61

Combine like terms: 61 + -61 = 0
0 + -1k = 0 + -61
-1k = 0 + -61

Combine like terms: 0 + -61 = -61
-1k = -61

Divide each side by '-1'.
k = 61

Simplifying
k = 61