[8y+3]=21

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Solution for [8y+3]=21 equation: 


Simplifying
[8y + 3] = 21

Reorder the terms:
[3 + 8y] = 21

Remove brackets around [3 + 8y]
3 + 8y = 21

Solving
3 + 8y = 21

Solving for variable 'y'.

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

Add '-3' to each side of the equation.
3 + -3 + 8y = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 8y = 21 + -3
8y = 21 + -3

Combine like terms: 21 + -3 = 18
8y = 18

Divide each side by '8'.
y = 2.25

Simplifying
y = 2.25

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