-15(-3a-4.2b+3.9)=

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Solution for -15(-3a-4.2b+3.9)= equation:


Simplifying
-15(-3a + -4.2b + 3.9) = 0

Reorder the terms:
-15(3.9 + -3a + -4.2b) = 0
(3.9 * -15 + -3a * -15 + -4.2b * -15) = 0
(-58.5 + 45a + 63b) = 0

Solving
-58.5 + 45a + 63b = 0

Solving for variable 'a'.

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

Add '58.5' to each side of the equation.
-58.5 + 45a + 58.5 + 63b = 0 + 58.5

Reorder the terms:
-58.5 + 58.5 + 45a + 63b = 0 + 58.5

Combine like terms: -58.5 + 58.5 = 0.0
0.0 + 45a + 63b = 0 + 58.5
45a + 63b = 0 + 58.5

Combine like terms: 0 + 58.5 = 58.5
45a + 63b = 58.5

Add '-63b' to each side of the equation.
45a + 63b + -63b = 58.5 + -63b

Combine like terms: 63b + -63b = 0
45a + 0 = 58.5 + -63b
45a = 58.5 + -63b

Divide each side by '45'.
a = 1.3 + -1.4b

Simplifying
a = 1.3 + -1.4b

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