45=6a+(42-4a)

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Solution for 45=6a+(42-4a) equation:


Simplifying
45 = 6a + (42 + -4a)

Remove parenthesis around (42 + -4a)
45 = 6a + 42 + -4a

Reorder the terms:
45 = 42 + 6a + -4a

Combine like terms: 6a + -4a = 2a
45 = 42 + 2a

Solving
45 = 42 + 2a

Solving for variable 'a'.

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

Add '-2a' to each side of the equation.
45 + -2a = 42 + 2a + -2a

Combine like terms: 2a + -2a = 0
45 + -2a = 42 + 0
45 + -2a = 42

Add '-45' to each side of the equation.
45 + -45 + -2a = 42 + -45

Combine like terms: 45 + -45 = 0
0 + -2a = 42 + -45
-2a = 42 + -45

Combine like terms: 42 + -45 = -3
-2a = -3

Divide each side by '-2'.
a = 1.5

Simplifying
a = 1.5

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