Question

y=-3x+1
y=-x+5
solve by graphing

Answer 1

\[3x+y=1\] ------------i)
\[x+y=5\] ------------ii)

\[3x+y=1\] --------i)*1
\[3x+3y=15\] --------ii)*3
(-) (-) (-)
-----------------
0 -2y= -14
then y=7
and x+7=5
x=-7+5
x=-2
x=-2 , y=7

Answer 2

sorry i can't can prove this graph in this screen i proved that in my copy book if you need urgent i will sent the attachment copy