how do you solve this using substitution??
oh and please type the numbers inside the parenthesis at the end =]
2007-09-08 13:37:42 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
y=y
4x + 5 = 2x + 10
4x - 2x = 10 - 5
2x = 5
x = 2.5
y = 2x + 10
y = 2 (2.5) +10
y = 5 + 10
y = 15
therefore,
(2.5, 15)
2007-09-08 13:47:01 · answer #1 · answered by Mona 2 · 0⤊ 0⤋
y=4x+5 and y=2x+10
Substitute first equation into second
now, 4x+5 = 2 x+10
so, 2x = 5 and x = 2.5
No substitute into either equation
So, y = 4(2.5) + 5 = 15
2007-09-08 13:40:15 · answer #2 · answered by ignoramus 7 · 0⤊ 0⤋
4x+5=2x+10
2007-09-08 13:44:03 · answer #3 · answered by Anonymous · 0⤊ 0⤋
We can subtract the first equation from the second to get:
0 = 2x - 5
Rearranging, we get:
2x = 5, or x = 2.5
We can plug this number into either equation to get the answer:
y = 2.5*4 + 5 = 10 + 5 = 15
You can also check the answer by plugging it into the original equations.
(x = 2.5, y = 15)
2007-09-08 13:46:32 · answer #4 · answered by Madadivad 2 · 0⤊ 0⤋
4x+5 = 2x+10
2x=5
x=2.5
2007-09-08 13:41:56 · answer #5 · answered by Anonymous · 1⤊ 0⤋
4x+5=2x+10
2x=5
x=2.5
2007-09-08 13:44:35 · answer #6 · answered by Anonymous · 0⤊ 0⤋
4x+5=2x+10
2x+5=10
2x=5
x=2.5
2007-09-08 13:42:43 · answer #7 · answered by Aaron 2 · 0⤊ 0⤋
y=4x+5 y=2x+10
4x+5=2x+10
4x-2x=10-5
2x=5
x=(2.5)
2007-09-08 13:51:03 · answer #8 · answered by Anonymous · 0⤊ 0⤋
y=4x+5 and y=2x+10
4x+5=2x+10
4x-2x=10-5
2x=5
x=(2.5)
2007-09-08 13:43:19 · answer #9 · answered by Anonymous · 0⤊ 0⤋
???????
2007-09-08 13:41:40 · answer #10 · answered by Ashley P 2 · 0⤊ 1⤋