Problema Solution
The sum of a number and 2 is 6 less than twice that number
Answer provided by our tutors
x + y = 2x - 6
x - 2x + y = -6
-x + y = -6
:
"Their difference is 10 less than four times the second number."
x - y = 4y - 10
x - y - 4y = -10
x - 5y = -10
:
Add the two equations
-x + y = -6
+x -5y = -10
-4y = -16
y =
y = +4
:
Find x using the 1st equation -x + y = -6
-x + 4 = -6
-x = -6 - 4
-x = -10
x = +10