15y-4=21y-28

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Solution for 15y-4=21y-28 equation:


Simplifying
15y + -4 = 21y + -28

Reorder the terms:
-4 + 15y = 21y + -28

Reorder the terms:
-4 + 15y = -28 + 21y

Solving
-4 + 15y = -28 + 21y

Solving for variable 'y'.

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

Add '-21y' to each side of the equation.
-4 + 15y + -21y = -28 + 21y + -21y

Combine like terms: 15y + -21y = -6y
-4 + -6y = -28 + 21y + -21y

Combine like terms: 21y + -21y = 0
-4 + -6y = -28 + 0
-4 + -6y = -28

Add '4' to each side of the equation.
-4 + 4 + -6y = -28 + 4

Combine like terms: -4 + 4 = 0
0 + -6y = -28 + 4
-6y = -28 + 4

Combine like terms: -28 + 4 = -24
-6y = -24

Divide each side by '-6'.
y = 4

Simplifying
y = 4

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