y=3xsin(-7x)

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Solution for y=3xsin(-7x) equation: 


Simplifying
y = 3xsin(-7x)

Remove parenthesis around (-7x)
y = 3insx * -7x

Reorder the terms for easier multiplication:
y = 3 * -7insx * x

Multiply 3 * -7
y = -21insx * x

Multiply insx * x
y = -21insx2

Solving
y = -21insx2

Solving for variable 'y'.

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

Simplifying
y = -21insx2

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