-3(a-5b-7c)=

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Solution for -3(a-5b-7c)= equation:


Simplifying
-3(a + -5b + -7c) = 0
(a * -3 + -5b * -3 + -7c * -3) = 0
(-3a + 15b + 21c) = 0

Solving
-3a + 15b + 21c = 0

Solving for variable 'a'.

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

Add '-15b' to each side of the equation.
-3a + 15b + -15b + 21c = 0 + -15b

Combine like terms: 15b + -15b = 0
-3a + 0 + 21c = 0 + -15b
-3a + 21c = 0 + -15b
Remove the zero:
-3a + 21c = -15b

Add '-21c' to each side of the equation.
-3a + 21c + -21c = -15b + -21c

Combine like terms: 21c + -21c = 0
-3a + 0 = -15b + -21c
-3a = -15b + -21c

Divide each side by '-3'.
a = 5b + 7c

Simplifying
a = 5b + 7c

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