MINI-SUMO help...more conditions in one

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if ((  linesensor_right  < kWhiteThreshold )  && (volts > 150))
        {
          go(50,-50);
         delay(1500); 
         Serial.println("RIGHT LINESENSOR TOUCHED");
        }
        else if ( linesensor_left  < kWhiteThreshold )
        {
         go(-50,50);
         delay(1500);
         Serial.println("LEFT LINESENSOR TOUCHED");
...