Question

1. Resolva as seguintes equações:
a) x - 3 = 7
j) 7x - 1 = 13
b) x + 4 = 10
k) 6x - 10 = 2x + 14
c) x + 101 = 300
1) 6x = 2x + 28
d) x - 279 = 237
m) 3(x + 2) = 15
e) X - 8 = -10
n) 2(x - 1) - 7 = 16
f) x + 9 = -1
0) 7(x - 2) = 5(x + 3)
9) 3x = 12
p) 2(x - 6) = -3(5 + x)

Answer 1

Explicação passo-a-passo:

1. Resolva as seguintes equações:

a) x - 3 = 7

x=7+3

x=10

j) 7x - 1 = 13

7x=13+1

7x=14

x=14/7

x=2

b) x + 4 = 10

x=10-4

x=6

k) 6x - 10 = 2x + 14

6x-2x=14+10

4x=24

x=24/4

x=6

c) x + 101 = 300

x=300-101

x=199

1) 6x = 2x + 28

6x-2x=28

4x=28

x=28/4

x=7

d) x - 279 = 237

x=237+279

x=516

m) 3(x + 2) = 15

3x+6=15

3x=15-6

3x= 9

x=9/3

x=3

e) X - 8 = -10

x= - 10 + 8

x= - 2

n) 2(x - 1) - 7 = 16

2x-2-7=16

2x-9=16

2x=16+9

2x=25

x=25/2

f) x + 9 = -1

x= -1 - 9

x= -10

0) 7(x - 2) = 5(x + 3)

7x-14 =5x+15

7x-5x=15- 14

7x=1

x=1/7

9) 3x = 12

x=4

p) 2(x - 6) = -3(5 + x)

2x-12=