Question

resolva as equações

a) 5x - 27= -4x
b) 5x + 21= 10x - 19
c) 5x - 7= 3x - 10
d) 23 - 2x = x + 25
e) 3 . (x + 4) x1 = 2 (2x+7)
f) 2x + 3 . (x - 2) = 7x + 34
g) 10 . (x - 1) - 7 . (x + 1) = 4
h) 2 . (x - 3) + 5x = 10 - (x + 1)
i) 2 . (1,6 + x) + 0,5 . (1 + x) = 4,2
j) 8x + 5 = 2 . (3x + 3) - 1

URGENTE!!!

Answer 1

A)
5x-27=-4x
-27=-4x-5x
-27=-9x
-27/9 = x
x=3

B)
5Xx+21=10x-19
-5x=-40x(-1)
5x=40
x=40/5
x=8

C)
5x-7=3x-10
5x-3x=10+7
2x=3
x=-3/2
x=-1,5

D)
23-2x=x+25
-2x-x=25-23
-3x=2
x=-2/3

E)
3.(x+4)x1=2(2x+7)
3x+12+1=4x+14
-4x+3x=-12-1+14
-x=-13+14=+1
x=-1

F)
2x+3.(x-2)=7x+34
2x+3x-6=7x+34
2x+3x-7x=34+6
-2x=40
x=40/2
x=-20

G)
10.(x-1)-7.(x+1)=4
10x-10-7x-7=4
10x-7x=4+7+10
3x=21
x=21/3
x=7

(não consegui responder a H)

I)
2.(1,6+x)+0,5(1+x)=4,2
3,2+2x+0,5+0,5x=4,2
2x+0,5x=4,2-3,2-0,5
2,5x=0,5
x=0,5/2,5
x=0,2

J)
8x+5=6x+6-1
8x-6x=6-1-5
2x=5-5
2x=0
x=0/2
x=0