Question

resolova as equaçoes em R :
a) 2x+6=x+18
b) 5x-3=2x+9
c)3(2x-3)+2(x+1)= 3x+18
d) 2x+3 (x-5)=4x+9
e)2(x+1)-3(x-5)=6x-3

Presiso das equaçoes montadas e respondidas!

Answer 1

a) 2x+6=x+18
2x-x=18-6
x=12
b) 5x-3=2x+9
5x-2x=9+3
3x=12
x=12/3
x=4
c) 3(2x-3)+2(x+1)=3x+18
6x-9+2x+2=3x+18
6x+2x-3x=18-2+9
8x-3x=16+9
5x=25
x=25/5
x=5
d) 2x+3(x-5)=4x+9
2x+3x-15=4x+9
2x+3x-4x=9+15
5x-4x=24
x=24
e) 2(x+1)-3(x-5)=6x-3
2x+2-3x+15=6x-3
2x-3x-6x=-3-15-2
2x-9x=-20
-7x=-20.(-1)
7x=20
x=20/7