1 .Resolva, em R (números reais),as seguintes equações do 1º grau
c) 2x/3 - 1/2 + 5x/2 + 4/3
d) 6x/5 - x+3/2 = x/3 - 1
4x/6 + 15x/6 -3/6 + 8/6 = 0
19x/6 + 5/6 = 0
19x = - 5
x = - 5/19
d)6x/5 - x + 3/2 = x/3 - 1
18x/15 - 15x/15 - 5x/15 = -1 - 3/2
-2x/15 = - 5/2
x = (-5/2) / (-2/15)
x = 5/2 * 15/2
x = 75/4
Comments
c) 2x/3 - 1/2 + 5x/2 + 4/3
4x/6 + 15x/6 -3/6 + 8/6 = 0
19x/6 + 5/6 = 0
19x = - 5
x = - 5/19
d)6x/5 - x + 3/2 = x/3 - 1
18x/15 - 15x/15 - 5x/15 = -1 - 3/2
-2x/15 = - 5/2
x = (-5/2) / (-2/15)
x = 5/2 * 15/2
x = 75/4