Which is the most efficient first step to solve for x in the equation 3. 7 x minus 18 = negative 4. 3 x minus 34? Add 3. 7x to both sides of the equation. Add 4. 3x to both sides of the equation. Subtract 18 from both sides of the equation. Subtract 34 from both sides of the equation.

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.