Answer: here's how you solve equations like that ok so first off 22+7=29 now but 22-7=15 so then you add a negative to 22 so -22+7=-15
or you could go the easy rout and just plug in numbers till you get your answer but the reason it wouldn't be 8 or -8 is because while yes 8+7=15 but -8+7=-1 so it couldn't be 8 or -8 you already know the reason why we cant use 22 so that would leave
Answer is (-22)
Explanation: