Which of the following sets of numbers could not represent the three sides of a right triangle? \{39,80,89\}{39,80,89} \{51,68,85\}{51,68,85} \{48,64,80\}{48,64,80} \{13,48,50\}{13,48,50}

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =