- 4x 6 =- 5y 9 July 8, 2019 16 32 64 128 4x 6 =- 5y 9 solve for y 4x 6 =- 5y 9 rearrange the equation so x is the independent variable 4x 5y 6 7x 9y 12 100x10 60a 4x 5y 6 9a 8y 12 3 4x 5y 6 8x 9 3 4x 5y 9z 6 5x 3y 2z 6 5y =- 9 4x 3y 13 6xy - 4y + 6 - 9x 4 + 4 = 6 4 x 6 + 5