Question

A=4

3 + a + 7 - 5 + 10 + a -a=

Answer 1

3+4+7-5+10+4-4=19

Explanation:

3+a=3+4+7-5+10+a=10+4-a=10+4-4=19

Answer 2

3 + 4 + 7 - 5 + 10 + 4 - 4 = 21