81+4y-1=90

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Solution for 81+4y-1=90 equation:


Simplifying
81 + 4y + -1 = 90

Reorder the terms:
81 + -1 + 4y = 90

Combine like terms: 81 + -1 = 80
80 + 4y = 90

Solving
80 + 4y = 90

Solving for variable 'y'.

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

Add '-80' to each side of the equation.
80 + -80 + 4y = 90 + -80

Combine like terms: 80 + -80 = 0
0 + 4y = 90 + -80
4y = 90 + -80

Combine like terms: 90 + -80 = 10
4y = 10

Divide each side by '4'.
y = 2.5

Simplifying
y = 2.5

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