7-y-3y+1=28

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Solution for 7-y-3y+1=28 equation:


Simplifying
7 + -1y + -3y + 1 = 28

Reorder the terms:
7 + 1 + -1y + -3y = 28

Combine like terms: 7 + 1 = 8
8 + -1y + -3y = 28

Combine like terms: -1y + -3y = -4y
8 + -4y = 28

Solving
8 + -4y = 28

Solving for variable 'y'.

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

Add '-8' to each side of the equation.
8 + -8 + -4y = 28 + -8

Combine like terms: 8 + -8 = 0
0 + -4y = 28 + -8
-4y = 28 + -8

Combine like terms: 28 + -8 = 20
-4y = 20

Divide each side by '-4'.
y = -5

Simplifying
y = -5

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