Question

solve for x and y
{y=-2x+1
{3x-2y=9

Answer 1

You can solve by graphing, elimination or substitution. Which method do you want me to use out of the last 2 options?

Answer 2

put the value of y from first to 2nd one-------this is called substitution method
3x-2(-2x+1)=9
3x+4x-2=9
7x-2=9
7x=9+2
7x=11
x=11/7
put in any equation u will get y:)

Answer 3

substitution
i can find x but I can't find y I'm not sure how to do it

Answer 4

thank you

Answer 5

Elimination:
Put the -2x in the first term on the left hand side by adding 2x

2x+y=1 (1)
3x-2y=9 (2)

2x+y=1 multiply by (2)
you get:
4x+2y=2
3x-2y=9

Add together:
7x=11
x = 11/7
Put x=11/7 in any of the original equations and solve for y:
2*(11/7)+y=1
solve for y = 1-22/7
y=-15/7