There are 78 kilograms of salt in the kitchen. Mrs. Jackson used 215 of therthe salt when she was preparing dinner. How much salt did she use?.

You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣

Find the solution of system of equation y= x-4 y=4x+2

Answer this question! 30 points and brainliest! only if you know the answer.