(10+a)+(3a)=58

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Solution for (10+a)+(3a)=58 equation:


Simplifying
(10 + a) + (3a) = 58

Remove parenthesis around (10 + a)
10 + a + (3a) = 58

Combine like terms: a + (3a) = 4a
10 + 4a = 58

Solving
10 + 4a = 58

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 + 4a = 58 + -10

Combine like terms: 10 + -10 = 0
0 + 4a = 58 + -10
4a = 58 + -10

Combine like terms: 58 + -10 = 48
4a = 48

Divide each side by '4'.
a = 12

Simplifying
a = 12

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