Question

Me ajudem pfvrrrr, preciso entregar amanhã ​

Answer 1

Resposta:

Explicação passo-a-passo:

a) x+7=10

x=10-7

x=3

b)2x-8=12

2x=12+8

2x=20

x=20/2

x=10

c)4x-1=-3x+20

4x+3x=20+1

7x=21

x=21/7

x=3

d) x+9=2

x=2-9

x=-7

e)x-7=-3

x=-3+7

x=4

f) 2.(x+4)=10

2x+8=10

2x=18

x=18/2

x=18

g) x/2 =6

x=6*2

x=12

h) x+2/3=1

x+2=1*3

x+2=3

x=3+2

x=5

i) x+y=7

 

x+y=7

x-y=1

2x=8

x=4

4+y=7

y=7-4

y=3

j)x-y = 2

x-y=2

x+y=2

2x=4

x=4/2

x=2

2-y=2

-y=2-2 (*-1)

y=2-2

y=0