78=30+n

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Solution for 78=30+n equation:


Simplifying
78 = 30 + n

Solving
78 = 30 + n

Solving for variable 'n'.

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

Add '-1n' to each side of the equation.
78 + -1n = 30 + n + -1n

Combine like terms: n + -1n = 0
78 + -1n = 30 + 0
78 + -1n = 30

Add '-78' to each side of the equation.
78 + -78 + -1n = 30 + -78

Combine like terms: 78 + -78 = 0
0 + -1n = 30 + -78
-1n = 30 + -78

Combine like terms: 30 + -78 = -48
-1n = -48

Divide each side by '-1'.
n = 48

Simplifying
n = 48

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