3(0)-y=-7

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


Simplifying
3(0) + -1y = -7

Multiply 3 * 0
0 + -1y = -7

Anything times zero is zero.
0 + -1y = -7
Remove the zero:
-1y = -7

Solving
-1y = -7

Solving for variable 'y'.

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

Divide each side by '-1'.
y = 7

Simplifying
y = 7

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