The sum of 3 numbers is -4. The second number decreased by the third is equal to the first. The sum of the first and second numbers is -5. Write the system of equations and find the numbers.
a+b+c= -4 b-c=a a+b= -5 you can substitute a+b for -5. -5+c= -4 c=1 you can also substitute a for b-c and c for 1 b-c+b+c= -4 2b= -4 b= -2 then substitute b for -2 a-2= -5 a= -3
