4+5=7+n

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Solution for 4+5=7+n equation:


Simplifying
4 + 5 = 7 + n

Combine like terms: 4 + 5 = 9
9 = 7 + n

Solving
9 = 7 + 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.
9 + -1n = 7 + n + -1n

Combine like terms: n + -1n = 0
9 + -1n = 7 + 0
9 + -1n = 7

Add '-9' to each side of the equation.
9 + -9 + -1n = 7 + -9

Combine like terms: 9 + -9 = 0
0 + -1n = 7 + -9
-1n = 7 + -9

Combine like terms: 7 + -9 = -2
-1n = -2

Divide each side by '-1'.
n = 2

Simplifying
n = 2

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