4(-2.5)-y=9

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Solution for 4(-2.5)-y=9 equation: 


Simplifying
4(-2.5) + -1y = 9

Multiply 4 * -2.5
-10 + -1y = 9

Solving
-10 + -1y = 9

Solving for variable 'y'.

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

Add '10' to each side of the equation.
-10 + 10 + -1y = 9 + 10

Combine like terms: -10 + 10 = 0
0 + -1y = 9 + 10
-1y = 9 + 10

Combine like terms: 9 + 10 = 19
-1y = 19

Divide each side by '-1'.
y = -19

Simplifying
y = -19

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