20+30*0+1=a

Solution for 20+30*0+1=a equation:

Simplifying
20 + 30 * 0 + 1 = a

Multiply 30 * 0
20 + 0 + 1 = a

Anything times zero is zero.
20 + 0 + 1 = a

Combine like terms: 20 + 0 = 20
20 + 1 = a

Combine like terms: 20 + 1 = 21
21 = a

Solving
21 = a

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.
21 + -1a = a + -1a

Combine like terms: a + -1a = 0
21 + -1a = 0

Add '-21' to each side of the equation.
21 + -21 + -1a = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -1a = 0 + -21
-1a = 0 + -21

Combine like terms: 0 + -21 = -21
-1a = -21

Divide each side by '-1'.
a = 21

Simplifying
a = 21