7X +12 = 75 solve the equation for x

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Before simplifying, how many terms are there in the expression 2x - 5y + 3 + x?

If square root x = -7, then x= -49 true or false