2007-11-04 15:12:16 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
i came up with x=3 and y=9. Is this correct?
2007-11-04 15:15:31 · update #1
2x + 3 = 3x
x = 3
y = 9
2007-11-04 19:53:38 · answer #1 · answered by Como 7 · 0⤊ 1⤋
y=2x+3
y = 3x SUBSTITUTE this value for y into the first equation
y = 2x+3
3x = 2x + 3 SUBTRACT 2x from both sides
x = 3 ANSWER
SUBSTITUTE x = 3 into the first equation to solve for y
y = 2x + 3
y = 2(3) + 3
y = 6 + 3
y = 9 ANSWER
CHECK substitute these values for x and y into the second equation
y = 3x
9 = 3(3)
9 = 9 it checks out
2007-11-04 23:18:05 · answer #2 · answered by r r 5 · 0⤊ 0⤋
y=2x+3 equation (1)
y = 3x equation (2)
Substitute y in equation (1)
3x = 2x + 3
Subtract 2x to both sides of the equation:
x = 3
y = 9
2007-11-04 23:18:20 · answer #3 · answered by edith p 3 · 0⤊ 0⤋
Here is the working:
Substitute y=3x into y=2x+3
3x=2x+3
3x-2x=3
x=3
Substitute x=3 into y=3x
y=3*3
y=9
You are correct. =)
2007-11-04 23:15:16 · answer #4 · answered by in_life 1 · 0⤊ 0⤋
3x=2x+3
subtract 2x
x=3
2007-11-04 23:15:30 · answer #5 · answered by Franklin 5 · 0⤊ 0⤋
3x = 2x +3
x = 3
y = 9
Edit:
Yes you are correct.
2007-11-04 23:15:43 · answer #6 · answered by David F 5 · 0⤊ 0⤋