6+4.2a=-24

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Solution for 6+4.2a=-24 equation: 


Simplifying
6 + 4.2a = -24

Solving
6 + 4.2a = -24

Solving for variable 'a'.

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

Add '-6' to each side of the equation.
6 + -6 + 4.2a = -24 + -6

Combine like terms: 6 + -6 = 0
0 + 4.2a = -24 + -6
4.2a = -24 + -6

Combine like terms: -24 + -6 = -30
4.2a = -30

Divide each side by '4.2'.
a = -7.142857143

Simplifying
a = -7.142857143

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