Question

resolva as equações:
d) 10=20+9x

e) 2x+5-x=5-3x

f) 2mx6=m

g) 2x+1=15

h) 5-x-20=5x-10-7x

i) X+6=2-3x

Answer 1

Vamos lá! !!
D) 10=20+9x (inverte colocando x pro primeiro membro)
9x+20=10
9x=10-20
9x= -10
x= -10/9

E)2x+5-x=5-3x
2x-x+3x+5=5
4x=5-5
x=0/4=0

F) ( ta escrita incorretamente)

G) 2x+1=15
2x=15-1
x=14÷2
x=7

H)5-x-20=5x-10-7x
-x+7x-5x+5-20=-10
x= -10+15=5

I)x+6=2-3x
x+3x+6=2
4x= -4
x= -4÷4=1