y^2+7y=42+6y

Solution for y^2+7y=42+6y equation:

Simplifying
y2 + 7y = 42 + 6y

Reorder the terms:
7y + y2 = 42 + 6y

Solving
7y + y2 = 42 + 6y

Solving for variable 'y'.

Reorder the terms:
-42 + 7y + -6y + y2 = 42 + 6y + -42 + -6y

Combine like terms: 7y + -6y = 1y
-42 + 1y + y2 = 42 + 6y + -42 + -6y

Reorder the terms:
-42 + 1y + y2 = 42 + -42 + 6y + -6y

Combine like terms: 42 + -42 = 0
-42 + 1y + y2 = 0 + 6y + -6y
-42 + 1y + y2 = 6y + -6y

Combine like terms: 6y + -6y = 0
-42 + 1y + y2 = 0

Factor a trinomial.
(-7 + -1y)(6 + -1y) = 0

Subproblem 1
Set the factor '(-7 + -1y)' equal to zero and attempt to solve:

Simplifying
-7 + -1y = 0

Solving
-7 + -1y = 0

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

Add '7' to each side of the equation.
-7 + 7 + -1y = 0 + 7

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

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

Divide each side by '-1'.
y = -7

Simplifying
y = -7
Subproblem 2
Set the factor '(6 + -1y)' equal to zero and attempt to solve:

Simplifying
6 + -1y = 0

Solving
6 + -1y = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1y = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1y = 0 + -6
-1y = 0 + -6

Combine like terms: 0 + -6 = -6
-1y = -6

Divide each side by '-1'.
y = 6

Simplifying
y = 6
Solution
y = {-7, 6}