21(y+2)=3y

Solution for 21(y+2)=3y equation:

Simplifying
21(y + 2) = 3y

Reorder the terms:
21(2 + y) = 3y
(2 * 21 + y * 21) = 3y
(42 + 21y) = 3y

Solving
42 + 21y = 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.
42 + 21y + -3y = 3y + -3y

Combine like terms: 21y + -3y = 18y
42 + 18y = 3y + -3y

Combine like terms: 3y + -3y = 0
42 + 18y = 0

Add '-42' to each side of the equation.
42 + -42 + 18y = 0 + -42

Combine like terms: 42 + -42 = 0
0 + 18y = 0 + -42
18y = 0 + -42

Combine like terms: 0 + -42 = -42
18y = -42

Divide each side by '18'.
y = -2.333333333

Simplifying
y = -2.333333333