How do you solve 7x+3y=0

You're solving for variable 'X'.

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

Add '-3Y' to each side of the equation.

7X + 3Y + - 3Y = 0 + - 3Y

Combine like terms:

3Y + - 3Y = 0

7X + 0 = 0 + - 3Y

7X = 0 + - 3Y

Remove the zero:

7X = - 3Y

Divide each side by

'7'. X = - 0.4285714286Y

Simplifying

X = - 0.4285714286Y