Question

3-resolva as equaçoes;
e)-x-2x-4=11
i)3x-2+4x+9=42
j)5x+4=3x-2x+4
k)x+x-4=17-2x+1

Answer 1

e) -x-2x-4=11 -> -3x-4=11 -> -3x=11-4 -> -3x=7 x(-1) -> x=7/3
i) 3x-2+4x+9=42 -> 7x+7=42 -> 7x=42-7 -> 7x= 35 -> x= 35/7 -> x=5
j) 5x+4=3x-2x+4 -> 5x+4=x+4 -> 5x-x=4-4 -> 4x=0 -> x=0
k) x+x-4=17-2x+1 -> 2x-4=18-2x -> 2x+2x=18-4 -> 4x=14 -> x= 14/4