30=y-4y

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Solution for 30=y-4y equation:


Simplifying
30 = y + -4y

Combine like terms: y + -4y = -3y
30 = -3y

Solving
30 = -3y

Solving for variable 'y'.

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

Add '3y' to each side of the equation.
30 + 3y = -3y + 3y

Combine like terms: -3y + 3y = 0
30 + 3y = 0

Add '-30' to each side of the equation.
30 + -30 + 3y = 0 + -30

Combine like terms: 30 + -30 = 0
0 + 3y = 0 + -30
3y = 0 + -30

Combine like terms: 0 + -30 = -30
3y = -30

Divide each side by '3'.
y = -10

Simplifying
y = -10

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