Problema Solution
THE SUM OF TWO NUMBERS IS 17, AND THEIR DIFFERENCE IS 29. WHAT ARE THE TWO NUMBERS?
Answer provided by our tutors
x+y=17
x-y=29
this is a linear equation
get rid of one of the variables first, i choose x. So
x+y= 17
- - -
x-y = 29
2y=-12
y=-6
take one of the equations above to find x
x+(-6)=17
x-6=17
x=17+6
x=23