5-7y-4=21

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


Simplifying
5 + -7y + -4 = 21

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

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

Solving
1 + -7y = 21

Solving for variable 'y'.

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

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

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

Combine like terms: 21 + -1 = 20
-7y = 20

Divide each side by '-7'.
y = -2.857142857

Simplifying
y = -2.857142857

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