Question

1) 4X – 12 = 2 (X+7 ) + 6

2) 5 ( X + 2 ) –3 ( X + 6 ) = 40

3) 7 ( 2 + X ) –5 ( X – 1,2 ) = 0

4) 3 ( X + 1 ) –2 ( X – 1) = - ( X + 5 )

5) 10 ( X + 1 ) –5 ( X – 2 ) = 70​

Answer 1

Resposta:

1)4x-1=7

4x=7+1

x=8/4

x=2

2)3x-9=12

3x=12+9

x=21/3

x=7

5)2x-6=16

2x=16+6

x=22/2

x=11

7)4x-7=2x-8

4x-2x=-8+7

2x=-1

x=-1/2

8)6x-3=12-9x

6x+9x=12+3

15x=15

x=1

9)x+4-3x=4-12x

x-3x+12x=4-4

10x=0

x=0

10)6x-4+12=3+4x-9

6x-4x=-4+12-3+9

2x=14

x=14/2

x=7

13)3(x+2)=15

3x+6=15

3x=15-6

x=9/3

x=3

15)12x+3(x-1)=-2(x-1)+12

12x+3x-3=-2x+2+12

12x+3x+2x=2+12+3

17x=17

x=17/17

x=1

(3,4,6,11,12,14