7a+21b+42c=

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Solution for 7a+21b+42c= equation:


Simplifying
7a + 21b + 42c = 0

Solving
7a + 21b + 42c = 0

Solving for variable 'a'.

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

Add '-21b' to each side of the equation.
7a + 21b + -21b + 42c = 0 + -21b

Combine like terms: 21b + -21b = 0
7a + 0 + 42c = 0 + -21b
7a + 42c = 0 + -21b
Remove the zero:
7a + 42c = -21b

Add '-42c' to each side of the equation.
7a + 42c + -42c = -21b + -42c

Combine like terms: 42c + -42c = 0
7a + 0 = -21b + -42c
7a = -21b + -42c

Divide each side by '7'.
a = -3b + -6c

Simplifying
a = -3b + -6c

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