840+y=520

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Solution for 840+y=520 equation: 


Simplifying
840 + y = 520

Solving
840 + y = 520

Solving for variable 'y'.

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

Add '-840' to each side of the equation.
840 + -840 + y = 520 + -840

Combine like terms: 840 + -840 = 0
0 + y = 520 + -840
y = 520 + -840

Combine like terms: 520 + -840 = -320
y = -320

Simplifying
y = -320

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