21a+5a-7=0

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Solution for 21a+5a-7=0 equation:


Simplifying
21a + 5a + -7 = 0

Reorder the terms:
-7 + 21a + 5a = 0

Combine like terms: 21a + 5a = 26a
-7 + 26a = 0

Solving
-7 + 26a = 0

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + 26a = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 26a = 0 + 7
26a = 0 + 7

Combine like terms: 0 + 7 = 7
26a = 7

Divide each side by '26'.
a = 0.2692307692

Simplifying
a = 0.2692307692

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