Respuesta :

Architechtor
if you make 8 times 0.8 (because there is 8y so that means is there is eight 0.8), 8 times 0.8 is 6.4. so 40 minus 6.4 equals to 33.6. so there is 4x. 33.6 divide 4 is 8.4. 

x = 8.4