Question

ME AJUDEM POR FAVOR
calcule as equações com as propriedades distributiva a)5(x+4)=100
b)3(x+2)=14
c)2(3x-2)=46
d)7(3x-4)=64
e)4 (2x+1)=0

Answer 1

a)$5x+5.4=100$→$5x+20=100$→$5x=100-20$→$5x=80$→$x=80/5$→$x=16$

b)$3x+3.2=14$→$3x+6=14$→$3x=14-6$→$3x=8$→$x=8/3$

c)$2.3x-2.-2=46$→$6x-4=46$→$6x=46+4$→$6x=50$→$x=50/6$→$x=8,333333333333334$

d)$7.3x-7.-4=64$→$21x-28=64$→$21x=64+28$$21x=92$→$x=92/21$→$x=4,380952380952381$

e)$4.2x+4.1=0$→$8x+4=0$→$8x=0-4$→$8x=-4$→$x=-4/8$→$x=-0,5$

Answer 2

a)5(x+4)=100
5x+20=100
5x=100-20
5x=80
x=80/5
x=16

b)3(x+2)=14
3x+6=14
3x=14-6
3x=8
x=8/3

c)2(3x-2)=46
6x-4=46
6x=46+4
6x=50
x=50/6
x=25/3

d)7(3x-4)=64
21x-28=64
21x=64+28
21x=92
x=92/21

e)4(2x+1)=0
8x+4=0
8x=0-4
8x=-4
x=-4/8
x=-1/2