7.2y+3=3y+21

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Solution for 7.2y+3=3y+21 equation:


Simplifying
7.2y + 3 = 3y + 21

Reorder the terms:
3 + 7.2y = 3y + 21

Reorder the terms:
3 + 7.2y = 21 + 3y

Solving
3 + 7.2y = 21 + 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.
3 + 7.2y + -3y = 21 + 3y + -3y

Combine like terms: 7.2y + -3y = 4.2y
3 + 4.2y = 21 + 3y + -3y

Combine like terms: 3y + -3y = 0
3 + 4.2y = 21 + 0
3 + 4.2y = 21

Add '-3' to each side of the equation.
3 + -3 + 4.2y = 21 + -3

Combine like terms: 3 + -3 = 0
0 + 4.2y = 21 + -3
4.2y = 21 + -3

Combine like terms: 21 + -3 = 18
4.2y = 18

Divide each side by '4.2'.
y = 4.285714286

Simplifying
y = 4.285714286

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