Question

Resolva as equações abaixo:
a)3x-1710=930
b)5x+765=12530
c)9x+1800=27900
d)4x+400=2x-560
e)7x-980+5x+120
f)3x+510=999

Answer 1

a)3x=930+1710

3x= 2640

x= 2640/3

x= 880

b)5x=12530-765

5x=11765

x=11765/5

x=2353

c)9x=27900-1800

9x=26100

x=26100/9

x=2900

d)4x-2x= -560-400

2x= -960

x= -960/2

x= -480

e)7x-5x=120+980

2x=1100

x=1100/2

x=550

f)3x+510=999

3x=999-510

3x=489

x=489/3

x=163