3x +7x+x+x should be your answer
Probably the first one "multiply equation A by -4". In order to cancel them out out multiply the first equation by negative 4 and then you add both equations once you add both equations -4+4=0 so they cancel out.
Cool
what is the questoin ? xD
Xyz = 60
As
2 x 3 x 10 = 60
45-26=19
19 toy cars are not in the box.
