7a+11=3a+21

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Solution for 7a+11=3a+21 equation:


Simplifying
7a + 11 = 3a + 21

Reorder the terms:
11 + 7a = 3a + 21

Reorder the terms:
11 + 7a = 21 + 3a

Solving
11 + 7a = 21 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
11 + 7a + -3a = 21 + 3a + -3a

Combine like terms: 7a + -3a = 4a
11 + 4a = 21 + 3a + -3a

Combine like terms: 3a + -3a = 0
11 + 4a = 21 + 0
11 + 4a = 21

Add '-11' to each side of the equation.
11 + -11 + 4a = 21 + -11

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

Combine like terms: 21 + -11 = 10
4a = 10

Divide each side by '4'.
a = 2.5

Simplifying
a = 2.5

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