Question

Alguém pode me ajudar ?

Answer 1

Resposta:

só isolar o X e inverter o sinal

Explicação passo-a-passo:

A)x+7=14-----------> x=14-7  ------>x=87

B)x-16=20--------->x=20+16-----> x=36

C)3x=9------------>x=9/3---------->x=3

D)5x=-15---------->x=-15/5------->x=-3

E)2x+7=11--------->2x=11-7------->2x=4------>x=4/2------>x=2

F)5x-2=13-------->5x=13+2------>x=15/5---->x=3

G)3x+1=2+2------>3x+1=4-------->3x=4-1--------->x=3/3   x=1

H)x/9=3------------>x=9*3--------> x=27