Question

resolva as equações, sendo U=Q :
a)5(x-1)=2(x+4)
b)3(×-2)=-4 (5-3×)
c) 5 (×-1)+2=7 (×+1)-11
d)5 (×-3)-2 (×+3)=0

Answer 1

a) 5(x-1)=2(x+4)) ⇒ 5x-5 = 2x+8 ⇒ 5x-2x=8+5 ⇒ 3x=13 ⇒ x=13/3

b) 3(x-2)=-4(5-3x) ⇒ 3x-6=-20+12x ⇒ 3x-12x=-20+6 ⇒ -9x=-14 ⇒ x=-14/-9 ⇒ x=14/9

c) 5(x-1)+2=7(x+1)-11 ⇒ 5x-5+2=7x+7-11 ⇒ 5x-3=7x-4 ⇒ 5x-7x=-4+3 ⇒ -2x=-1 ⇒x=1/2

d) 5(x-3)-2(x+3)= ⇒5x-15-2x-6=0 ⇒ 3x=21 ⇒ x=21/3