Question

Sabendo que U = Q, resolva as equações.
a) 2x+ (9 - x) = 8 – (3x – 6)
b) 8•(2x - 1) = 6·(5x - 2) - 10
c) y-[y- (2 - y) – 1] + 4 =-(-3 - y)
d) 2•(x - 2) – 3•(1 – x) = 20 - (x - 4)​

Answer 1

Resposta:

Explicação passo-a-passo:

a)2x+(9-x)=8-(3x-6)                

2x+9-x=8-3x+6

x+9=-3x+14

x+3x=14-9

4x=5

x=5/4

b)8.(2x-1)=6.(5x-2)-10

16x-8=30x-12-10

16x-8=30x-22

30x-22=16x-8

30x-16x=22-8

14x=14

x=1

c)y-[y-(2-y)-1]+4=-(-3-y)

y-[y-2+y-1]+4=3+y

y-[2y-3]+4=3+y

y-2y+3+4=3+y

-y+7=3+y

3+y=-y+7

y+y=7-3

2y=4

y=2

d)2.(x-2)-3.(1-x)=20-(x-4)

2x-4-3+3x=20-x+4

5x-7=-x+24

5x-x=24+7

4x=31

x=31/4