21*18=(20*N)+(1*18)

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Solution for 21*18=(20*N)+(1*18) equation:


Simplifying
21 * 18 = (20N) + (1 * 18)

Multiply 21 * 18
378 = (20N) + (1 * 18)

Multiply 1 * 18
378 = (20N) + (18)
378 = (20N) + 18

Reorder the terms:
378 = 18 + (20N)

Solving
378 = 18 + (20N)

Solving for variable 'N'.

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

Add '(-20N)' to each side of the equation.
378 + (-20N) = 18 + (20N) + (-20N)

Combine like terms: (20N) + (-20N) = 0
378 + (-20N) = 18 + 0
378 + (-20N) = 18

Add '-378' to each side of the equation.
378 + -378 + (-20N) = 18 + -378

Combine like terms: 378 + -378 = 0
0 + (-20N) = 18 + -378
(-20N) = 18 + -378

Combine like terms: 18 + -378 = -360
(-20N) = -360

Divide each side by '-20'.
N = 18

Simplifying
N = 18

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