1000=m+50(3)+m+a

Solution for 1000=m+50(3)+m+a equation:

Simplifying
1000 = m + 50(3) + m + a

Multiply 50 * 3
1000 = m + 150 + m + a

Reorder the terms:
1000 = 150 + a + m + m

Combine like terms: m + m = 2m
1000 = 150 + a + 2m

Solving
1000 = 150 + a + 2m

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
1000 + -1a = 150 + a + -1a + 2m

Combine like terms: a + -1a = 0
1000 + -1a = 150 + 0 + 2m
1000 + -1a = 150 + 2m

Add '-1000' to each side of the equation.
1000 + -1000 + -1a = 150 + -1000 + 2m

Combine like terms: 1000 + -1000 = 0
0 + -1a = 150 + -1000 + 2m
-1a = 150 + -1000 + 2m

Combine like terms: 150 + -1000 = -850
-1a = -850 + 2m

Divide each side by '-1'.
a = 850 + -2m

Simplifying
a = 850 + -2m