Question

Y = 2x - 3 x + y = 3 What is the solution set?

Answer 1

y=2x-3 an x+y=3

subsitution

since y=2x-3, put (2x-3) wherever you see y

put taht in the other equation

x+y=3

x+(2x-3)=3

x+2x-3=3

3x-3=3

add 3 to both sides

3x=6

divide by 3

x=2

subsitute back

y=2x-3

y=2(3)-3

y=6-3

y=3

so the solution set in (x,y) form is (2,3)