3(5y-7)=-66

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Solution for 3(5y-7)=-66 equation:


Simplifying
3(5y + -7) = -66

Reorder the terms:
3(-7 + 5y) = -66
(-7 * 3 + 5y * 3) = -66
(-21 + 15y) = -66

Solving
-21 + 15y = -66

Solving for variable 'y'.

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

Add '21' to each side of the equation.
-21 + 21 + 15y = -66 + 21

Combine like terms: -21 + 21 = 0
0 + 15y = -66 + 21
15y = -66 + 21

Combine like terms: -66 + 21 = -45
15y = -45

Divide each side by '15'.
y = -3

Simplifying
y = -3

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