Question

quais sao a respostas dessas equacoes todas explicadas 4x=-20\x+20=0\ xsobre5 =2\ x-5=1\ 7x= 21 \ -3x=-6\ x-22sobre3=0 \x+1sobre 2=1\6x=-6

Answer 1

a) 
4x=-20
x = -20/4
x = -5

b)  
x+20=0
x = -20

c)  
x/5 =2
x = 2*5
x = 10

d)
x-5 = 1
x = 1 + 5
x = 6

e)
7x = 21 
x = 21/7
x = 3

f) 
-3x = -6
x = -6/-3
x = 2

g)
x -22/3 = 0
x = 22/3

h)
x +1/2 = 1
(2x +1)/2 = 1
2x + 1 = 1*2
2x = 2-1
2x = 1
x = 1/2

i) 
6x = -6
x = -6/6
x = -1

Answer 2

■ 4x = -20 ⇔ x = -20/4 ⇔ x = -5

■x + 20 = 0 ⇔ x = -20

■x/5 = 2 ⇔ x = 5 * 2 ⇔ x = 10

■ x - 5 = 1 ⇔ x = 5 + 1 ⇔ x = 6

■7x = 21 ⇔ x = 21/7 ⇔ x = 3

■-3x = -6 ⇔ x = -6/-3 ⇔ x = 2

■(x - 22)/3 = 0 ⇔ x - 22 = 0 * 3 ⇔ x - 22 = 0 ⇔ x = 22

■ (x + 1)/2 = 1 ⇔ x + 1 = 2 * 1 ⇔ x + 1 = 2 ⇔ x = 2 - 1 ⇔ x = 1

■ 6x = -6 ⇔ x = -6/6 ⇔ x = -1

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17/02/2016 
Sepauto - SSRC
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