am+pn=r+7

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Solution for am+pn=r+7 equation: 


Simplifying
am + pn = r + 7

Reorder the terms:
am + np = 7 + r

Solving
am + np = 7 + r

Solving for variable 'a'.

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

Add '-1np' to each side of the equation.
am + np + -1np = 7 + -1np + r

Combine like terms: np + -1np = 0
am + 0 = 7 + -1np + r
am = 7 + -1np + r

Divide each side by 'm'.
a = 7m-1 + -1m-1np + m-1r

Simplifying
a = 7m-1 + -1m-1np + m-1r

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