Question

determine mentalmente o valor de cada equação : a) x-8=0. b)x/4=3 c)6x=-18. d) x+8=0. e)x+5=12. f)y+8=5. g)x+5=21. h) y-3=100. i)x/20=5.

Answer 1

a) x-8=0
x = 8

b)x/4=3
x = 12

c)6x=-18
x = -3

d) x+8=0
x = -8

e)x+5=12
x = 7

f)y+8=5
y = -3

g)x+5=21
x = 16

h) y-3=100
y = 103

i)x/20=5
x = 100

Answer 2

Olá, boa tarde ☺

Resoluções:

a)

x - 8 = 0

x = 8

b)

x/4 = 3

x = 3 * 4

x = 12

c)

6x = -18

x=-18/6

x=-3

d)

x + 8 = 0

x = -8

e)

x + 5 = 12

x = 12 - 5

x = 7

f)

y + 8 = 5

y = 5 - 8

y = -3

g)

x + 5 = 21

x= 21 - 5

x= 16

h)

y - 3 = 100

y = 100 + 3

y = 103

i)

x/20 = 5

x= 5 * 20

x=100.

Bons estudos :)