Question

Resolva as equações(se possível com conta)

a)5x-7=3x-10
b)15x-13=39-11x
c)7x+11=15+5x
d)7,2x-o,48=o,48+4,8x
e)21+9x=15x+33
f)2x+0,8-3,5=x

Rápido se possivel

Answer 1

Resolva as equações(se possível com conta)

a)5x-7=3x-10

5x-3x= -10+7

2x=-3

x= -3/2




b)15x-13=39-11x


15x+11x= 39+13

26x= 52

x=52/26

x=2




c)7x+11=15+5x

7x-5x=15-11

2x=4

x=4/2

x=2




d)7,2x-o,48=o,48+4,8x


7,2x-4,8x=0,48+0,48

2,4x=0,96

x=0,96/2,4

x=0,4



e)21+9x=15x+33

9x-15x=33-21

-6x= 12

x= -12/6

x= - 2



f)2x+0,8-3,5=x

2x- x = 2,7

x= 2,7