log[10]a+log[10](a+21)=2

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Solution for log[10]a+log[10](a+21)=2 equation:


Simplifying
log[10] * a + log[10](a + 21) = 2

Reorder the terms for easier multiplication:
10glo * a + log[10](a + 21) = 2

Multiply glo * a
10aglo + log[10](a + 21) = 2

Reorder the terms:
10aglo + glo * 10(21 + a) = 2

Reorder the terms for easier multiplication:
10aglo + 10glo(21 + a) = 2
10aglo + (21 * 10glo + a * 10glo) = 2

Reorder the terms:
10aglo + (10aglo + 210glo) = 2
10aglo + (10aglo + 210glo) = 2

Combine like terms: 10aglo + 10aglo = 20aglo
20aglo + 210glo = 2

Solving
20aglo + 210glo = 2

Solving for variable 'a'.

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

Add '-210glo' to each side of the equation.
20aglo + 210glo + -210glo = 2 + -210glo

Combine like terms: 210glo + -210glo = 0
20aglo + 0 = 2 + -210glo
20aglo = 2 + -210glo

Divide each side by '20glo'.
a = 0.1g-1l-1o-1 + -10.5

Simplifying
a = 0.1g-1l-1o-1 + -10.5

Reorder the terms:
a = -10.5 + 0.1g-1l-1o-1

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