Whats the solution to x=3?

2-digit numbers less than 91 which are 1 less than a multiple of 10

How many grams must be adde to 970g to make 1 and a half kg

Elm street is straight. willard's house is at point h between the school at point s and the mall at point m. if sh = 3 miles and hm = 4.5 miles, what is the value of sm in miles?