Question 119635
when you use substitution, you SUBSTITUTE the value of one unknown in terms of another unknown


the first equation tells you that y and 2X are the same (equal)


when you go to the second equation, you SUBSTITUTE 2X in place of y __ 3X+(2X)=10


so 5X=10, and X=2


now, you can go to any equation that has X and y
___ and SUBSTITUTE 2 for X to find y


y=2X __ y=2(2) __ y=4