Respuesta :

apologiabiology
2 and 1/5=2+1/5=10/5+1/5=11/5
multiply both sides by 40
30(1/2x+1/5)-5x=88
expand
15x+6-5x=88
10x+6=88
minus 6 both sides
10x=82
divide both sides by 10
x=82/10=8 and 1/5
3/4(1/2x+1/5)-1/8x=2 1/5
3/4(1/2x+1/5)-1/8x=11/5
3/8x+3/20-1/8x=11/5
2/8x+3/20-11/5=0
1/4x-41/20=0
1/4x=41/20
x=41/5
x=8.2