2(-21)-5y=-5

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Solution for 2(-21)-5y=-5 equation: 


Simplifying
2(-21) + -5y = -5

Multiply 2 * -21
-42 + -5y = -5

Solving
-42 + -5y = -5

Solving for variable 'y'.

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

Add '42' to each side of the equation.
-42 + 42 + -5y = -5 + 42

Combine like terms: -42 + 42 = 0
0 + -5y = -5 + 42
-5y = -5 + 42

Combine like terms: -5 + 42 = 37
-5y = 37

Divide each side by '-5'.
y = -7.4

Simplifying
y = -7.4

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