1-)resolva:18x-43=65
A )2.
B )4.
C )6.
D )8.
2-)resolva:2x-16=14-17x
A )3/4.
B )4/5.
C )5/4.
D )6/4.
3-)resolva:10y-5(1+y)=3(2y-2)-20
A )19.
B )21.
C )23.
D )25.
4-)resolva:2(x+4)+x+3=20+12
A )4.
B )7.
C )9.
D )11.
5-)resolva:(x-5)/10+(1-2x)/5=(3-x)/4
A )21.
B )-31.
C )-21.
D )41.
Soluções para a tarefa
Resposta:1)C)6
2)nenhuma das alternativas
3)B)21
4)nenhuma das alternativas
5)nenhuma das alternativas
Explicação passo-a-passo:
1)18x-43=65 2)2x-16=14-17x 3)10y-5(1+y)=3(2y-2)-20
18x=65+43 2x+17x=14+16 10y-5-5y=6y-6-20
18x=108 19x=30 5y-5=6y-26
x=108/18 x=30/19 5y-6y=-26+5
x=6 -y=-21(-1)
y=21
4)2(x+4)+x+3=20+12 5)(x-5)/10+(1-2x)/5=(3-x)/4
2x+8+x+3=32 2x+10/20+4-8x/20=15-5x/20
3x+11=32 2x+10+4-8x=15-5x
3x=32-11 -6x+14=15-5x
3x=21 -6x+5x=15-14
x=21/7 -x=1(-1)
x=3 x=-1