Substitution would be the simplest method of solution for which system? 5/3 x = 6y and 2x -3y = 8 3x - 2y =18 and 4x + 5y =60 y = 2x and x + y = 28

Agiven line has the equation 2x + 12y = −1. what is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)? y = ( )x + 9

Give me the equations of two lines that have the same slope but are not parallel.

Combine like terms to make a simpler expression 3z+z