Question

Pesssoal urgente por favor !!!!!
Preciso resposta inteira com resolução

Answer 1

Resposta:

$1)~a)~2x+5-x=5-3x=2x-x+3x+5-5=0\\ \\ 4x=0~~~~x=\frac{0}{4} ~~~~x=0$

$b)~3(x+1)-4(x-2)=6\\ \\ 3x+3-4x+8-6=0\\ \\ 4x-3x+6-8-3=0\\ \\ x-5=0~~~~~~x=5\\ \\ c)~\frac{(x+2)}{4} -\frac{(x-1)}{5} =1~~~~~~~~~~~~~~~~mmc=20\\ \\ \frac{5(x+2)-4(x-1)=20}{20} \\ \\ 5x+10-4x+4-20=0\\ \\ 5x-4x+10+4-20=0\\ \\ x-14=0\\ \\ x=14$

$d)~x+6=2-3x\\ \\ x+3x=2-6\\ \\ 4x=-4\\ \\ x=-\frac{4}{4}~~~~~~x=-1$

$e)~2x-3(x-1)=8-2(x-2)\\ \\ 2x-3x+3=8-2x+4\\ \\ 2x-3x+2x=8+4-3\\ \\ x=9$

$f)~\frac{3x+2}{2} -\frac{x-2}{4} =1~~~~~~~~~~mmc=4\\ \\ \frac{2(3x+2)-1(x-2)=4\\ }{4} \\ \\ 6x+4-x+2=4\\ \\ 6x-x=4-4+2\\ \\ 5x=2\\ \\ x=\frac{2}{5}~~~~~~ou~~~~~~x=0,4$

$2)\\ \\ um~numero=x\\ o~triplo~de~um~numero=3x\\ a~metade~desse~numero=\frac{x}{2} \\ \\ 3x-20=\frac{x}{2} ~~~~~~~~mmc=2\\ \\ \frac{6x-40=x}{2} ~~~~~~~~~6x-40=x\\ \\ 6x-x=40\\ \\ 5x=40\\ \\ x=\frac{40}{5}\\ \\ x=8$

$3)\\ \\ um~numero=x\\ o~dobro~do~numero~adicionado~a~tres=2x+3\\ o~sucessor~do~numero=x+1\\ \\ 2x+3=x+1\\ \\ 2x-x=1-3\\ \\ x=-2\\ \\ \\ \\ Espero~ter~ajudado!$