Step-by-step explanation:
Very easy, replace x with everything
equation 1: -2/3(3*-19/6)-4]+3*-19/6=5/6
Equation 2: -2/3 (3*-11/6)-4]+3*-11/6=5/6
equation 3: -2/3 (3*21/6)-4]+3*21/6=5/6
Equation 4: -2/3 (3*29/6)-4]+3*29/6=5/6
Solve all 4 equations
Cheers! Mark brainliest if helpful enough.