oii eu preciso de ajuda nessa atividade
a) 9x – 2 = 4x + 18
b) 2x – 10 + 7x + 10 = 180
c) 7y – 10 = y + 50
d) 4x – 18 + 3x = 10
e) 2x + 5 + x + 7 = 18
f) 5x – 91 = 4x – 77
g) 7x + 1 = 5x – 7
h) 4x + 5 = x + 20
i) 3x + 3 + 4x – 6 = 5x – 5 + 8
j) 2x + 10 – 4 = 26
k) 3x + 9 – 5 = 22
l) 4x + 14 + 9x – 15 = 12x – 15 – 1
m) 3x + 6 = 2 x – 14
Soluções para a tarefa
Resposta:
A)4
Explicação passo-a-passo:
9x-2 = 4x + 18
9x- 4x = 18 + 2
5x = 20
x = 4
Resposta
a) 9x – 2 = 4x + 18
9x - 4x = 18+2
5x = 20
x= 20 /5
x= 4
b) 2x – 10 + 7x + 10 = 180
2x+7x= 180- 10+10
9x= 180
x = 180 /9
x= 20
c) 7y – 10 = y + 50
7y - y= 50+10
6y=60
y= 60 /6
y = 10
d) 4x – 18 + 3x = 10
4x+3x = 10+18
7x= 28
x= 28 /7
x= 4
e) 2x + 5 + x + 7 = 18
2x+x = 18-5-7
3x=6
x = 6 /3
x= 2
f) 5x – 91 = 4x – 77
5x-4x=-77+91
x= 14
g) 7x + 1 = 5x – 7
7x-5x=-7-1
2x=-8
x= -8 /2
x=-4
h) 4x + 5 = x + 20
4x+x=20-5
3x=15
x=15 /3
x=5
i) 3x + 3 + 4x – 6 = 5x – 5 + 8
3x+4x-5x= -5+8+6-3
2x=6
x=6 /3
x=2
j) 2x + 10 – 4 = 26
2x= 26-10+4
2x=20
x= 20 /2
x= 10
k) 3x + 9 – 5 = 22
3x= 22- 9+ 5
3x=18
x= 18 /3
x= 6
l) 4x + 14 + 9x – 15 = 12x – 15 – 1
4x+9x-12x= -15-1+15-14
x=-15
m) 3x + 6 = 2 x – 14
3x-2x= -14-6
x=-20