Question

Pesquisar e resolver 10 equacões do primeiro grau.

Answer 1

1) 3x+4 = 5x-7 ----> 2x = 11 ---> x = 5,5
2) 9x - 6 = -10x + 25 ----> 19x = 31 ---> x = 31÷19
3) 10x + 4 - 3x = 0 ----> 7x = -4 ----> x = -4÷7
4) 7x + 3 - 2x = 4(x + 1) ----> 5x + 3 = 4x + 4
x = 1
5) 10 - 10x = 6 - 6x ----> 4x = 4 ---> x = 1
6) 3 + 7x - 3x + 4 = 0 ----> 4x = 7 ---> x = 7÷4
7) 13 - x + 4 = 2(x+1) ----> 17 - x = 2x + 2 ---> x = 19÷3
8) 6x - 4 + 3x = 3x - 8 ----> 6x = - 4 ----> x = -(2÷3)
9) 3x + 4 = 3 - 4x ----> 7x = - 1 ---> x = -1÷7
10) 3x(x+2) = 2x + 4 ----> 3x = 2 ----> x = 2÷3
Ufa! Bom, espero ter ajudado.

Answer 2

8x- 15= 3x

8x-3x= 15

5x= 15

X= 15/5

X=3

➖

7x-9= 5

7x= 5+9

7x= 14

X= 14/7

X= 2

➖

2x+4= 8

2x= 8-4

2x= 4

X= 4/2

X= 2

➖

2x= 4

X= 4/2

X= 2

➖

3x+5= 8

3x= 8-5

3x= 3

X= 3/3

X= 1

➖

2x-8= 3x-10

2x-3x= -10-8

-1x= -18 .(-1)

X= 18

➖

3x= 9

X= 9/3

X= 3

➖

2x-6= 4+10

2x= 4+10+6

2x= 20

X= 20/2

X= 10

➖

15x-5= 10

15x= 10+5

15x= 15

X= 15/15

X= 1

➖

13x+7x- 9= 6+5

20x= 6+5+9

20x= 20

X= 20/20

X= 1