Question

5 – [23 – {19 – (15 - ?)} ] = 12 x 2 ÷ (1/2)​

Answer 1

Step-by-step explanation:

5-[23-{19+5-x}] = 12×1

5-[23-19-5+x] =12

5+23+19+5-x = 12

52-x = 12

-x = 12-52

x = 40.