1) Resolva as equações:
a)9x+=4x
b)3x=-7+x
c)20=-6x+32
d)7x+1-5x=9
e)y+9y+5=-15
f)20x-13=20+9x
g)17x-1=15x+3
h)16-x=x+25
i)21x+1=11x+6
j)9x-23=13x-27
h)0.8+2x=x+3.5
Respostas
respondido por:
2
b) 3x = -7 + x d) 7x+ 1-5x = -15
3x-x = -7 7x - 5x = -15 -1
2x = - 7 2x= - 16
x = -7/ 2 x= -16/2
x= -8
c)20 = -x + 32
x = 32 -20
x = 12
e) y+9y+5=-15 g) 17x-1 = 15x +3
y-9y = -15 - 5 17x-15x=3+1
8y = -10 2x=4
y = -10/8 x=4/2
y= -5/4 x=2
h) 16-x = x+25
-x-x = 25-16
-2x= 9 .(-1)
2x=-9
x=-9/2
3x-x = -7 7x - 5x = -15 -1
2x = - 7 2x= - 16
x = -7/ 2 x= -16/2
x= -8
c)20 = -x + 32
x = 32 -20
x = 12
e) y+9y+5=-15 g) 17x-1 = 15x +3
y-9y = -15 - 5 17x-15x=3+1
8y = -10 2x=4
y = -10/8 x=4/2
y= -5/4 x=2
h) 16-x = x+25
-x-x = 25-16
-2x= 9 .(-1)
2x=-9
x=-9/2
gatinha3639:
f) 20x-13= 20+9x 20x-9x= 20+13 11x= 33 x = 33/11
Perguntas similares
6 anos atrás
6 anos atrás
9 anos atrás
9 anos atrás
9 anos atrás
9 anos atrás