Question

Calcule o valor de x:

Answer 1

5.

a)
$180 - 120 = 60 \\ 180 - 140 = 40 \\ 180 - (60 + 40) = 180 - 100 = 80 \\ \\ x + 80 = 180 \\ x = 180 - 80 = 100$

b)
$180 - 120 = 60 \\ \\ 2x = 60 \\ x = \frac{60}{2} = 30$