Question

1) Resolva as equações do 1º grau:
a) x - 3 = 13
b) 3y + 6 = 15
c) x + 5 = 8
d) x - 4 = 3
e) x + 6 = 5
f) x -3 = - 7
g) x + 9 = -1
h) x + 28 = 11
i) x - 109 = 5
j) 3x = 15
k) 13x = 13
l) 84 = 6x
m) 3x – 4 = 2x + 8
n) 7x – 2 + 4 = 10 + 5x
o) 4(x + 3) =1
p) 5(2x -4) = 7 ( x + 1) – 3

Ajudaaa por favorrr
Com os cálculos!​

Answer 1

1) Resolva as equações do 1º grau:

$a) x - 3 = 13\\ x = 13 + 3\\ x = 16$

$b) 3y + 6 = 15\\ 3y = 15 - 6\\ 3y = 9\\ y = 9 /3\\ y = 3$

     

$c) x + 5 = 8\\ x = 8 - 5\\ x = 3$

$d) x - 4 = 3\\ x = 3 + 4\\ x = 7$

$e) x + 6 = 5\\ x = 5 - 6\\ x = -1$

$f) x -3 = - 7\\ x = -7 + 3\\ x = -4$

$g) x + 9 = -1\\ x = -1 - 9\\ x = -10$

$h) x + 28 = 11\\ x = 11 - 28\\ x = -17$

$i) x - 109 = 5\\ x = 5 + 109\\ x = 114$

$j) 3x = 15\\ x = 15/3\\ x = 5$

$k) 13x = 13\\ x = 13/13\\ x = 1$

$l) 84 = 6x\\ x = 84 / 6\\ x = 14$

$m) 3x - 4 = 2x + 8\\ 3x - 2x = 8 + 4\\ x = 12$

$n) 7x - 2 + 4 = 10 + 5x \\\\ 7x - 5x = 10 + 2 - 4\\ \\ 2x = 8\\ \\ x = 8/2\\ \\ x = 4$

$o) 4(x + 3) =1\\ 4x + 12 = 1\\ 4x = 1 - 12\\ 4x = -11\\ x = -11/4$

$p) 5(2x -4) = 7 ( x + 1) - 3\\\\ 10x - 20 = 7x + 7 - 3\\\\\\ 10x -7x = 7 - 3 + 20\\\\ 3x = 24\\\\ x = 24 / 3\\\\x = 8$

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Answer 2

Explicação passo-a-passo:

x - 3 = 13

x=13+3

x=16

3y + 6 = 15

3y=15-6

3y=9

y=9/3

y=3

x + 5 = 8

x=8-5

x=3

x - 4 = 3

x=3+4

x=7

x + 6 = 5

x=5-6

x=-1

x -3 = - 7

x=-7+3

x=-4

x + 9 = -1

x=-1-9

x=-10

x + 28 = 11

x=11-28

x=-17

x - 109 = 5

x=5+109

x=114

3x = 15

x=15/3

x=5

13x = 13

x=13/13

x=1

84 = 6x

6x=84

x=84/6

x=14

3x – 4 = 2x + 8

3x-2x=8+4

x=12

7x – 2 + 4 = 10 + 5x

7x+2=10+5x

7x-5x=10-2

2x=8

x=8/2

x=4

4(x + 3) =1

4x+12=1

4x=1-12

4x=-11

x=-11/4

5(2x -4) = 7 ( x + 1) – 3

10x-20=7x+7-3

10x-20=7x+4

10x-7x=4+20

3x=24

x=24/3

x=8