30+2n-7=20

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Solution for 30+2n-7=20 equation:


Simplifying
30 + 2n + -7 = 20

Reorder the terms:
30 + -7 + 2n = 20

Combine like terms: 30 + -7 = 23
23 + 2n = 20

Solving
23 + 2n = 20

Solving for variable 'n'.

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

Add '-23' to each side of the equation.
23 + -23 + 2n = 20 + -23

Combine like terms: 23 + -23 = 0
0 + 2n = 20 + -23
2n = 20 + -23

Combine like terms: 20 + -23 = -3
2n = -3

Divide each side by '2'.
n = -1.5

Simplifying
n = -1.5

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