0b+3b+7a+21=

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Solution for 0b+3b+7a+21= equation:


Simplifying
0b + 3b + 7a + 21 = 0

Anything times zero is zero.
0b + 3b + 7a + 21 = 0

Reorder the terms:
0 + 21 + 7a + 3b = 0

Combine like terms: 0 + 21 = 21
21 + 7a + 3b = 0

Solving
21 + 7a + 3b = 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 + 7a + -21 + 3b = 0 + -21

Reorder the terms:
21 + -21 + 7a + 3b = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 7a + 3b = 0 + -21
7a + 3b = 0 + -21

Combine like terms: 0 + -21 = -21
7a + 3b = -21

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

Combine like terms: 3b + -3b = 0
7a + 0 = -21 + -3b
7a = -21 + -3b

Divide each side by '7'.
a = -3 + -0.4285714286b

Simplifying
a = -3 + -0.4285714286b

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