9-(4y-21)=1-5y

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Solution for 9-(4y-21)=1-5y equation: 


Simplifying
9 + -1(4y + -21) = 1 + -5y

Reorder the terms:
9 + -1(-21 + 4y) = 1 + -5y
9 + (-21 * -1 + 4y * -1) = 1 + -5y
9 + (21 + -4y) = 1 + -5y

Combine like terms: 9 + 21 = 30
30 + -4y = 1 + -5y

Solving
30 + -4y = 1 + -5y

Solving for variable 'y'.

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

Add '5y' to each side of the equation.
30 + -4y + 5y = 1 + -5y + 5y

Combine like terms: -4y + 5y = 1y
30 + 1y = 1 + -5y + 5y

Combine like terms: -5y + 5y = 0
30 + 1y = 1 + 0
30 + 1y = 1

Add '-30' to each side of the equation.
30 + -30 + 1y = 1 + -30

Combine like terms: 30 + -30 = 0
0 + 1y = 1 + -30
1y = 1 + -30

Combine like terms: 1 + -30 = -29
1y = -29

Divide each side by '1'.
y = -29

Simplifying
y = -29

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