7(0)-3y=21

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Solution for 7(0)-3y=21 equation: 


Simplifying
7(0) + -3y = 21

Multiply 7 * 0
0 + -3y = 21

Anything times zero is zero.
0 + -3y = 21
Remove the zero:
-3y = 21

Solving
-3y = 21

Solving for variable 'y'.

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

Divide each side by '-3'.
y = -7

Simplifying
y = -7

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