Question

Resolva as equações: ( Me ajudem, por favor! é pra amanhã!)

A) x+4=20

B) x+2x+9=18

C) x/2 + x + 1 =20

D) 2 (x+3) = 24

E) 6x +2 = 2 (x+3)

Answer 1

$Ola'! \\ \\ \boxed{A}~~x+4=20 \\ ~~~~~~~~~x=20-4 \\ ~~~~~~\underline{~~x=16~//} \\ \\ ~\boxed{B}~~~x+2x+9=18 \\ ~~~~~~~~~3x=18-9 \\ ~~~~~~~~~3x=9 \\ ~~~~~~~~\underline{~x=3~//} \\ \\ \boxed{C}~~ \frac{x}{2}+x+1=20 \\~~~~~~~~ x+2x+2=40 \\ ~~~~~~~~3x=38 \\ ~~~~~~~\underline{~x= \frac{38}{3}~// } \\ \\ \boxed{D}~~2(x+3)=24 \\~~~~~~~~~~ x+3=12 \\~~~~~~~~~~~~ ~\underline{~x=9~//} \\ \\\boxed{ E}~~6x+2=2(x+3) \\ ~~~~~~~~3x+1=x+3 \\ ~~~~~~~~3x-x=3-1 \\ ~~~~~~~~2x=2\\ ~~~~~~\underline{~x=1~//}$