4y+7=5y+21

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Solution for 4y+7=5y+21 equation:


Simplifying
4y + 7 = 5y + 21

Reorder the terms:
7 + 4y = 5y + 21

Reorder the terms:
7 + 4y = 21 + 5y

Solving
7 + 4y = 21 + 5y

Solving for variable 'y'.

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

Add '-5y' to each side of the equation.
7 + 4y + -5y = 21 + 5y + -5y

Combine like terms: 4y + -5y = -1y
7 + -1y = 21 + 5y + -5y

Combine like terms: 5y + -5y = 0
7 + -1y = 21 + 0
7 + -1y = 21

Add '-7' to each side of the equation.
7 + -7 + -1y = 21 + -7

Combine like terms: 7 + -7 = 0
0 + -1y = 21 + -7
-1y = 21 + -7

Combine like terms: 21 + -7 = 14
-1y = 14

Divide each side by '-1'.
y = -14

Simplifying
y = -14

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