8.4=5+7+y

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Solution for 8.4=5+7+y equation:


Simplifying
8.4 = 5 + 7 + y

Combine like terms: 5 + 7 = 12
8.4 = 12 + y

Solving
8.4 = 12 + y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
8.4 + -1y = 12 + y + -1y

Combine like terms: y + -1y = 0
8.4 + -1y = 12 + 0
8.4 + -1y = 12

Add '-8.4' to each side of the equation.
8.4 + -8.4 + -1y = 12 + -8.4

Combine like terms: 8.4 + -8.4 = 0.0
0.0 + -1y = 12 + -8.4
-1y = 12 + -8.4

Combine like terms: 12 + -8.4 = 3.6
-1y = 3.6

Divide each side by '-1'.
y = -3.6

Simplifying
y = -3.6

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