Question

1)Dentro do conjunto Q resolver as equações do Primeiro grau com uma incognita a)7x+1-5x=9
b)y+9y+5=15
c)17x-1=15x+3
d)16-x=x+25
e)20x-13=20+9x
f)15+24x=13x+37
g)21x+1=11x+6
h)9x-23=13x-27
i)0,8+2x=x+3,5
j)3,5+1=3,1x+3
k)2x+7-x=3-4x
l)5-x-22=4x-11-6x
Respostas Completas PFF Obrigado :)

Answer 1

a) 7x+1-5x=9
7x-5x=9-1
2x=8
x=8/2
x=4
b) y+9y+5=15
y+9y=15-5
10y=10
y=10/10
y=1
c) 17x-1=15x+3
17x-15x=3+1
2x=4
x=4/2
x=2
d) 16-x=x+25
-x-x=25-16
-2x=9.(-1)
2x=-9
x=-9/2
e) 20x-13=20+9x
20x-9x=20+13
11x=33
x=33/11
x=3
f) 15+24x=13x+37
24x-13x=37-15
11x=22
x=22/11
x=2
g) 21x+1=11x+6
21x-11x=6-1
10x=5
x=5/10 (÷5)
x=1/2
h) 9x-23=13x-27
9x-13x=-27+23
-4x=-4.(-1)
4x=4
x=4/4
x=1
i) 0,8+2x=x+3,5
2x-x=3,5-0,8
x=2,7
j) 3,5+1=3,1x+3
3,5+1-3=3,1x
3,5-2=3,1x
1,5=3,1x
1,5/3,1=x
x=0,48
k) 2x+7-x=3-4x
2x-x+4x=3-7
x+4x=-4
5x=-4
x=-4/5
l) 5-x-22=4x-11-6x
-x-4x+6x=-11+22-5
-5x+6x=+11-5
x=6

Answer 2

b) y+9y+5=15
y+9y=15-5
10y=10
y= 10/10
y= 1

c) 17x-1=15x+3
17x-15x=3+1
2x=4
x=4/2
x=2

e)20x-13=20+9x
20x-9x=20+13
11x=33
x=33/11
x=3

f)15+24x=13x+37
24x-13x=37-15
11x=22
x = 22/11
x= 2

g) 21x+1=11×+6
21x-11x=6-1
10x=5
x= 5:5
10 :5

x= 1/2

só consegui essas, espero ter ajudado