Question 85420
Question:

Evaluate.    42 + 2•7 – (5 • 4 – 15)

Answer:




First of all simplify the terms inside the parenthisis.....

where.....,  5 . 4 = 20



Then, 


  42 + 2•7 – (5 • 4 – 15)==> 42 + 2•7 – (20 – 15)



Now, 20 - 15 = 5


==> 42 + 2•7 – (5)


Now 2 . 7 = 14




==> 42 + 14 – 5


==> 56 - 5 


==> 51



So the answer is 51




Hope you understood.




Regards.



Praseena.