Please, I am terrified of doing these, please could someone explain it to me? Thank you, so much.
*To the best answer
2007-11-20 08:33:13 · 26 answers · asked by Sarah I 2 in Science & Mathematics ➔ Mathematics
ok here is how you do this.
3x - 2y + 7x +4y
add the x's together:
10x-2y+4y
now add the y's together:
10x + 2y
theres your answer.
2007-11-20 08:37:01 · answer #1 · answered by Mn Guy =) 3 · 2⤊ 0⤋
Ok, to do these, all you do is combine like terms. This means putting together all the numbers with the same variables, or letters. So you would just add 3x and 7x to make 10x. Then the subtraction sign becomes a negative sign for the 2y. So -2y + 4y is 2y. Your problem turns into 10x + 2y. Remember, always put the letters in alphabetical order. I hope this helps you!
2007-11-20 16:38:32 · answer #2 · answered by hpfreaket 1 · 1⤊ 1⤋
yes you have to combine the like terms. Anything with a similar variable can be combined. So put together all of the terms with the x and all the terms with the y. Just like basic math, 3+7 and -2+4 and tack an x on the first and a y on the second. 10x+2y and if need be you can take a 2 out and have 2(5x+y)
2007-11-20 16:35:30 · answer #3 · answered by Grumble 4 · 0⤊ 2⤋
just work with one variable at a time. start with the x's. cover up the y's with your fingers and you see 3x+7x. which = 10x. youre already half done!!!! and then do the same for y's cover up the x's and you get -2y=4y which = 2y
so a positive 2y and a positive 10x is 2y+10x.
2y+10x.
2007-11-20 16:42:30 · answer #4 · answered by Music Box 3 · 1⤊ 1⤋
its easy first do the numbers with x as coefficient
so 3x+7x=10x
and then do the numbers with y as coefficient
so -2y+4y=+2y
answer is 10x + 2y
we cant add 10x and 2y because the coefficients are different
so answer is
10x + 2y
2007-11-20 16:40:59 · answer #5 · answered by se 1 · 1⤊ 1⤋
add the like terms. Start with the Xs
so add 3x and 7x, you get 10x
now do the Ys
-2y and 4y, you get 2y
so the new equation is 10x+2y
hope that helps!
2007-11-20 16:37:54 · answer #6 · answered by Kayla J 2 · 1⤊ 1⤋
3x - 2y + 7x + 4y
first you have to combine your like terms
let's start with "x"
3x + 7x = 10x
now "y"
-2y + 4y = 2y
soo your answer....
10x + 2y...
we can't add 10x and 2y because they are not like terms so therefore the problem is simplified
hoped i helped
2007-11-20 16:41:46 · answer #7 · answered by jesus_died_just_4_us 2 · 1⤊ 1⤋
Combine like terms:
3x+7x=10x
-2y+4y=2y
Answer 10x+2y
(simplify, not solving..)
2007-11-20 16:37:14 · answer #8 · answered by It's a girl due 5/11/09 4 · 3⤊ 1⤋
3 apples - 2 oranges + 7 apples + 4 oranges
10 apples + 2 oranges
3x - 2y + 7x + 4y
10x + 2y
ie you add or subtract "things" that are the same.
2007-11-20 16:38:01 · answer #9 · answered by Como 7 · 3⤊ 1⤋
add or subtract like figures here
10x+2y
3x+7x=10x
-2y+4y=2y
2007-11-20 16:46:41 · answer #10 · answered by Dave aka Spider Monkey 7 · 1⤊ 1⤋