0=70n-(30n+1200)

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Solution for 0=70n-(30n+1200) equation:


Simplifying
0 = 70n + -1(30n + 1200)

Reorder the terms:
0 = 70n + -1(1200 + 30n)
0 = 70n + (1200 * -1 + 30n * -1)
0 = 70n + (-1200 + -30n)

Reorder the terms:
0 = -1200 + 70n + -30n

Combine like terms: 70n + -30n = 40n
0 = -1200 + 40n

Solving
0 = -1200 + 40n

Solving for variable 'n'.

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

Add '-40n' to each side of the equation.
0 + -40n = -1200 + 40n + -40n
Remove the zero:
-40n = -1200 + 40n + -40n

Combine like terms: 40n + -40n = 0
-40n = -1200 + 0
-40n = -1200

Divide each side by '-40'.
n = 30

Simplifying
n = 30

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