3(5y+4)-21=6(2y+1)+16

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Solution for 3(5y+4)-21=6(2y+1)+16 equation:


Simplifying
3(5y + 4) + -21 = 6(2y + 1) + 16

Reorder the terms:
3(4 + 5y) + -21 = 6(2y + 1) + 16
(4 * 3 + 5y * 3) + -21 = 6(2y + 1) + 16
(12 + 15y) + -21 = 6(2y + 1) + 16

Reorder the terms:
12 + -21 + 15y = 6(2y + 1) + 16

Combine like terms: 12 + -21 = -9
-9 + 15y = 6(2y + 1) + 16

Reorder the terms:
-9 + 15y = 6(1 + 2y) + 16
-9 + 15y = (1 * 6 + 2y * 6) + 16
-9 + 15y = (6 + 12y) + 16

Reorder the terms:
-9 + 15y = 6 + 16 + 12y

Combine like terms: 6 + 16 = 22
-9 + 15y = 22 + 12y

Solving
-9 + 15y = 22 + 12y

Solving for variable 'y'.

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

Add '-12y' to each side of the equation.
-9 + 15y + -12y = 22 + 12y + -12y

Combine like terms: 15y + -12y = 3y
-9 + 3y = 22 + 12y + -12y

Combine like terms: 12y + -12y = 0
-9 + 3y = 22 + 0
-9 + 3y = 22

Add '9' to each side of the equation.
-9 + 9 + 3y = 22 + 9

Combine like terms: -9 + 9 = 0
0 + 3y = 22 + 9
3y = 22 + 9

Combine like terms: 22 + 9 = 31
3y = 31

Divide each side by '3'.
y = 10.33333333

Simplifying
y = 10.33333333

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