4*0-5y=20

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Solution for 4*0-5y=20 equation: 


Simplifying
4 * 0 + -5y = 20

Multiply 4 * 0
0 + -5y = 20

Anything times zero is zero.
0 + -5y = 20
Remove the zero:
-5y = 20

Solving
-5y = 20

Solving for variable 'y'.

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

Divide each side by '-5'.
y = -4

Simplifying
y = -4

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