39a+4-20a=42

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Solution for 39a+4-20a=42 equation:


Simplifying
39a + 4 + -20a = 42

Reorder the terms:
4 + 39a + -20a = 42

Combine like terms: 39a + -20a = 19a
4 + 19a = 42

Solving
4 + 19a = 42

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + 19a = 42 + -4

Combine like terms: 4 + -4 = 0
0 + 19a = 42 + -4
19a = 42 + -4

Combine like terms: 42 + -4 = 38
19a = 38

Divide each side by '19'.
a = 2

Simplifying
a = 2

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