Question

Determine o valor de x nas figuras a seguir.


Me ajudem pfvv

Answer 1

Resposta:

a) 5x -20 = X +60

5x =X +60 +20

5x -X = 80

4x = 80

X = 80÷4

X = 20

b) X -20 = x/2 +45

-20 = x/2 +45 -X

-20 -45 = x/2 -x/1

-65 = x/2 - 2x/2

-65 = -x/2 ×(-1)

x/2 = -65

c) 6x -20 = 73

6x = 73 + 20

6x = 93

X = 93÷6

× = 15,5

d) 4x -75 = x +30

4x = x +30 +75

4x -x = 105

3x =105

X = 105÷ 3

X = 35