Question

resolva as equações
1) 4m-1=7
2) 3m-9=11
3)3x+2+4x+9
4)x\2 + 1\3= 4\3
5) 2x\3-1\4=x\2-1\2
6) x+4\2 -4\3= 3\2- 4-x\3
(preguiça de resolver)

Answer 1

1) 4m = 8 ⇒ m = 8/4 ⇒ m = 2
2) 3m = 20 ⇒ m = 20/3
3) 3x + 2 = 4x + 9 ⇒ 3x - 4x = 9 - 2 ⇒ -x = 7 ·(-1) ⇒ x = 7
4) x/2 = 3/3 ⇒ x/2 = 1 ⇒ x = 1·2 ⇒ x = 2
5) 2x/3-x/2 = -1/2+1/4 ⇒ 4x-3x/6 = -2+1/4 ⇒ x/6 = -1/4 ⇒ x = -1/4·6 ⇒ x = -6/4 ⇒ x = -3/2 ⇒ x = -1,5
6) x+4/2+4-x/3 = 3/2+4/3 ⇒ 3x+12+8-2x/6 = 9+8 ⇒ x+20/6 = 17 ⇒ x+20=102 ⇒ x = 82