Question

Me ajudem por favor :-: ​

Answer 1

Resposta:

a) x-12=39

x=39+12

x=51

b) -5x=-45

x=

$\frac{ - 45}{ - 5}$

x=9

c) 2x-13=5

2x=5+13

2x=18

x=9

d)6x+4=x-8

6x+x=-8-4

7x=-12

x=

$\frac{ - 12}{7}$

e)7x-10=-21x-4

7x+21x=-4+10

28x=6

×=

$\frac{6}{28}$

x=

$\frac{3}{14}$

f)4(2x-1)=3(x+1)+3

8x-4=3x+3+3

8x-3x=3+3+4

5x=10

x=2