1. if we multiply the number by 4 and then subtract 6 the answer is 50.
4x -6 = 50 ---> 4x =56 ---> x = 14
2. if we double the number and add 15 the answer is 53. 2x+15 = 53 ---> 2x = 38 ---> x = 19
if we add 7 to the number and then double the result the answer is 58. 2*(x+7) = 58---> x + 7 = 29 ---> x=22
if we subtract 15 from the number and then mulitply the result by 3 the answer is 48. 3*(x-15) = 48 ---> x-15 = 16 ---> x = 31
Hope the solution helped. Sometimes you need more than a solution. Contact fcabanski@hotmail.com for online, private tutoring, or personalized problem solving (quick for groups of problems.)