Question

Resolva abaixo as seguintes equação de 1 grau
1) 4×+6=×-3
2) 4y=16-8
3) 25b=5b-10
4) 3(n-2)=4n-6
5) 4c-3=c+9
6) 20k+100=80-10k
7) z+4z-3z=9+3-2z
8) 3×+2×=15-10
9) 2N+4N=18
10) 2(N-4)=-(3N-2)

Answer 1

1) 4x+6=x-3

4x-x=-3-6

3x= -9

x= -9/3

x= -3

2) 4y=16-8

4y= 8

y=8/4

y= 4

3) 25b=5b-10

25b-5b=-10

20b= -10

b= -10/20

b= -1/2

4) 3(n-2)= 4n-6

3n-6= 4n-6

3n-4n= -6 +6

-n= 0

n=0

5) 4c-3= c+9

4c-c= 9+3

3c = 12

c= 12/3

c= 4

6) 20k+100= 80-10k

20k+10k=80-100

30k= -20

k= -20/30

k= -2/3

7)z+4z-3z= 9+3-2z

2z= 12-2z

2z+2z=12

4z=12

z= 12/4

z=3

8) 3x+2x=15-10

5x=5

x=5/5

x=1

9) 2N+4N= 18

6N=18

N= 18/6

N= 3

10) 2(N-4)= -(-3N-2)

2N-8= 3N+6

2N-3N=6+8

-N= 14

N= -14