Question

75+ ? - 25=70 how to solve it

Answer 1

75 + ? = 70 + 25

(by taking -25 to other side it becomes +25)

Now we can see that...70+25=95 and

75 + 20 is also equal to 95

so the answer is 20

Answer 2

let ? be =x than
$75 + x - 25 = 70$
$75 + x = 70 + 25$
$75 + x = 95$
$x = 95 - 75$
$x = 20$
the answer should be 20