10+a=40

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Solution for 10+a=40 equation: 


Simplifying
10 + a = 40

Solving
10 + a = 40

Solving for variable 'a'.

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

Add '-10' to each side of the equation.
10 + -10 + a = 40 + -10

Combine like terms: 10 + -10 = 0
0 + a = 40 + -10
a = 40 + -10

Combine like terms: 40 + -10 = 30
a = 30

Simplifying
a = 30

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