Solve the equation by finding the common multiple. three fourths minus two fifths plus eight twentieths equals blank

seven twentieths
fifteen twentieths
twenty fifteenths
thirteen twentieths i need help asap

What is the value of x in the equation 6(x + 1) – 5x = 8 + 2(x – 1)?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.