4.2=6.9+c

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Solution for 4.2=6.9+c equation: 


Simplifying
4.2 = 6.9 + c

Solving
4.2 = 6.9 + c

Solving for variable 'c'.

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

Add '-1c' to each side of the equation.
4.2 + -1c = 6.9 + c + -1c

Combine like terms: c + -1c = 0
4.2 + -1c = 6.9 + 0
4.2 + -1c = 6.9

Add '-4.2' to each side of the equation.
4.2 + -4.2 + -1c = 6.9 + -4.2

Combine like terms: 4.2 + -4.2 = 0.0
0.0 + -1c = 6.9 + -4.2
-1c = 6.9 + -4.2

Combine like terms: 6.9 + -4.2 = 2.7
-1c = 2.7

Divide each side by '-1'.
c = -2.7

Simplifying
c = -2.7

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