Question

ex 5 (un biciclist a parcurs un drum astfel in prima zi………)

Answer 1

Explicație pas cu pas:

10/100 × x + 30/100 × x + 42 = x

1/10 × x + 3/10 × x + 42 = x

4/10 × x +42 = x

x - 4/10 × x = 42

10/10×x - 4 /10 × x = 42

6/10 × x = 42

x = 42 : 6/10

x = 42 × 10/6

x = 420/6

x = 70