2(10)(10)+2(12)(10)+2(10)(12)=A

Solution for 2(10)(10)+2(12)(10)+2(10)(12)=A equation:

Simplifying
2(10)(10) + 2(12)(10) + 2(10)(12) = A

Multiply 2 * 10
20 * 10 + 2(12)(10) + 2(10)(12) = A

Multiply 20 * 10
200 + 2(12)(10) + 2(10)(12) = A

Multiply 2 * 12
200 + 24 * 10 + 2(10)(12) = A

Multiply 24 * 10
200 + 240 + 2(10)(12) = A

Multiply 2 * 10
200 + 240 + 20 * 12 = A

Multiply 20 * 12
200 + 240 + 240 = A

Combine like terms: 200 + 240 = 440
440 + 240 = A

Combine like terms: 440 + 240 = 680
680 = A

Solving
680 = 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.
680 + -1A = A + -1A

Combine like terms: A + -1A = 0
680 + -1A = 0

Add '-680' to each side of the equation.
680 + -680 + -1A = 0 + -680

Combine like terms: 680 + -680 = 0
0 + -1A = 0 + -680
-1A = 0 + -680

Combine like terms: 0 + -680 = -680
-1A = -680

Divide each side by '-1'.
A = 680

Simplifying
A = 680