6(6-6y)+15y=90

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Solution for 6(6-6y)+15y=90 equation:


Simplifying
6(6 + -6y) + 15y = 90
(6 * 6 + -6y * 6) + 15y = 90
(36 + -36y) + 15y = 90

Combine like terms: -36y + 15y = -21y
36 + -21y = 90

Solving
36 + -21y = 90

Solving for variable 'y'.

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

Add '-36' to each side of the equation.
36 + -36 + -21y = 90 + -36

Combine like terms: 36 + -36 = 0
0 + -21y = 90 + -36
-21y = 90 + -36

Combine like terms: 90 + -36 = 54
-21y = 54

Divide each side by '-21'.
y = -2.571428571

Simplifying
y = -2.571428571

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