Question

₃⁄₄(2x+y)=9
⅝(2x=11y)=20

Solve question 6.2 above graphically ,i.e, plotting the lines on the same set of axes and determining the point of intersection. Does your answer agree with that obtained above?
can someone help me plz

Answer 1

sure

Answer 2

simultaneous equations

Answer 3

expand brackets

Answer 4

1.5x+0.75y=9
1.25x+6.875y=20

Answer 5

y+2x=12 --> y=-2x+12
y=2/11x+32/11

Answer 6

point of intersection, merge y's together

Answer 7

-2x+12=2/11x+32/11

Answer 8

24/11x=100/11

Answer 9

24x=100 --> x=25/6

Answer 10

that's your x co-ord

Answer 11

plug into any of the two equations to find y, and that's your co-ord

Answer 12

jeeezzzz u r so good at it!!!

Answer 13

medal please :]

Answer 14

thank you

Answer 15

can i replace x co-ord in this equation to find y?25x+6.875y=20