Please help. Create and solve a system of equations for each problem. The double of one number minus the triple of another is 5 and the difference of both is -1. What are the numbers?

The sum of two numbers is ​

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.

When steve woke up. his temperature was 102 degrees f. two hours later it was 3 degrees lower. what was his temperature then?

Pls on #2 and show me how to solve it