7(0)-Y=21

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Solution for 7(0)-Y=21 equation: 


Simplifying
7(0) + -1Y = 21

Multiply 7 * 0
0 + -1Y = 21

Anything times zero is zero.
0 + -1Y = 21
Remove the zero:
-1Y = 21

Solving
-1Y = 21

Solving for variable 'Y'.

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

Divide each side by '-1'.
Y = -21

Simplifying
Y = -21

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