-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 = -1
-1y = -1

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

Simplifying
y = 1

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