what should be substracted from 2a+8b+10 to get -3a+7b+16

To find out what should be subtracted from 2a+8b+10 to get -3a+7b+16, we need to set up an equation and solve for the unknown.

The equation is:

2a + 8b + 10 - X = -3a + 7b + 16

We can rearrange this equation to solve for X:

X = 2a + 8b + 10 - (-3a + 7b + 16)

Simplify the equation:

X = 2a + 8b + 10 + 3a - 7b - 16

Combine like terms:

X = 5a + b - 6

So, 5a + b - 6 should be subtracted from 2a + 8b + 10 to get -3a + 7b + 16.