A: 2x + 8y = 5 b: x + 9y = 10 to solve this system of equations by elimination, what could you multiply equation b by if you want to add the equations together and have a resulting equation with only the y-variable (the x-variable is eliminated)? a) −2 b) 2 c) − 1 2 d) 1 2

Answer :A)-2

Step-by-step explanation: If you multiply B; x + 9y =10 by -2 you will      have -2 x+ -18y= -20. Then when you add B with a 2x + 8y = 5

                                                                                      -2x +-18y=-20

                                                                                      =0 +-10y=-15