3(y+1)-5=21

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Solution for 3(y+1)-5=21 equation:


Simplifying
3(y + 1) + -5 = 21

Reorder the terms:
3(1 + y) + -5 = 21
(1 * 3 + y * 3) + -5 = 21
(3 + 3y) + -5 = 21

Reorder the terms:
3 + -5 + 3y = 21

Combine like terms: 3 + -5 = -2
-2 + 3y = 21

Solving
-2 + 3y = 21

Solving for variable 'y'.

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

Add '2' to each side of the equation.
-2 + 2 + 3y = 21 + 2

Combine like terms: -2 + 2 = 0
0 + 3y = 21 + 2
3y = 21 + 2

Combine like terms: 21 + 2 = 23
3y = 23

Divide each side by '3'.
y = 7.666666667

Simplifying
y = 7.666666667

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