7a-21+4a=

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Solution for 7a-21+4a= equation:


Simplifying
7a + -21 + 4a = 0

Reorder the terms:
-21 + 7a + 4a = 0

Combine like terms: 7a + 4a = 11a
-21 + 11a = 0

Solving
-21 + 11a = 0

Solving for variable 'a'.

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

Add '21' to each side of the equation.
-21 + 21 + 11a = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 11a = 0 + 21
11a = 0 + 21

Combine like terms: 0 + 21 = 21
11a = 21

Divide each side by '11'.
a = 1.909090909

Simplifying
a = 1.909090909

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