Question

Me ajudem por favor

Answer 1

Resposta:

5)

a) [x] [8] [10]

[y] + [-1] = [-9]

[z] [6] [5]

x + 8 = 10

x = 10 - 8

x = 2

y + -1 = -9

y -1 = -9

y = -9 + 1

y = -8

z + 6 = 5

z = 5 - 6

z = -1

b) [x + y] = [10]

[x - y] [4]

x + y = 10

x - y = 4

x + y = 10

x = 10 - y

x - y = 4

10 - y - y = 4

-y - y = 4 - 10

-2y = -6

y = -6/-2

y = 3

x + y = 10

x + 3 = 10

x = 10 - 3

x = 7

x - y = 4

7 - 3 = 4

x = 7

y = 3