What is the answer to 18x + 12 - 4

The transitive property of equality states that: o if a = b, then bra o if a = b, then ac = bc o if a = b and b= c, then a = if a = b and c= c, then a + b = b + c

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"