y+4+6y-5=90

Solution for y+4+6y-5=90 equation:

Simplifying
y + 4 + 6y + -5 = 90

Reorder the terms:
4 + -5 + y + 6y = 90

Combine like terms: 4 + -5 = -1
-1 + y + 6y = 90

Combine like terms: y + 6y = 7y
-1 + 7y = 90

Solving
-1 + 7y = 90

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 = 90 + 1

Combine like terms: -1 + 1 = 0
0 + 7y = 90 + 1
7y = 90 + 1

Combine like terms: 90 + 1 = 91
7y = 91

Divide each side by '7'.
y = 13

Simplifying
y = 13