I kinda need help here I don't know what r would be, would it be a like term or something else?
2006-11-09 13:14:22 · 8 answers · asked by i_heart_jake_ryan118 1 in Education & Reference ➔ Homework Help
i think its 43
2006-11-09 13:17:10 · answer #1 · answered by Anonymous · 0⤊ 2⤋
R is a variable. r=-3
Steps:
1. Change the signs to all of the subtraction so it would look like:
3(r+(-6)) +2=4(r+2)+(-21)
2. Multiply all the numbers inside the parenthesis by the numbers outside the parenthesis:
3r+(-18)+2=4r+8+(-21)
3. Cancel out the negative 21 by adding positive 21 to make it 0 then adding it to -18:
3r+3+2=4r+8
4.Add 3 and 2:
3r+5=4r+8
5. Add -8 to 8 to make it 0 then add it to 5:
3r+(-3)=4r
6.Add negative 3r to 3r to make it 0 then to 4r:
(-3)=r
2006-11-09 13:17:22 · answer #2 · answered by Anonymous · 0⤊ 0⤋
3(r-6) + 2 = 4 (r +2 ) - 21
3r-18 +2 = 4r + 8 - 21
3r - 16 = 4r - 13
put like terms on like sides and when bringing across things the symbol chages.
3r - 4r = +16 - 13
work it out.
r = 3
2006-11-09 13:44:27 · answer #3 · answered by crazee_gabby 2 · 0⤊ 1⤋
3(r-6)+2=4(r+2)-21
=> 3r-18+2=4r+8-21
=>3r-4r=8-21+18-2
=>-r=3=>r= -3
2006-11-09 15:39:42 · answer #4 · answered by alpha 7 · 1⤊ 0⤋
removing the brackets
3r-18+2=4r+8-21
simplifying
3r-16=4r-13
adding 16
3r=4r+3
adding -3r
0=r+3
adding -3
r=-3
2006-11-09 13:27:55 · answer #5 · answered by raj 7 · 2⤊ 0⤋
3(r-6)+2=4(r+2)-21
3r-18+2=4r+8-21
3r-16=4r-13
r=3
2006-11-09 13:32:27 · answer #6 · answered by tommiesonn 2 · 0⤊ 1⤋
this is math problem so You just need to solve for r, since this is a variable, an unknown number, you need to find the value of it, r does not stand for anything, it is just an unknown number and you need to find the value. that's all.
2006-11-09 17:52:59 · answer #7 · answered by Anonymous · 1⤊ 0⤋
I think R= - 8/1
2006-11-09 13:20:36 · answer #8 · answered by m_harvery 3 · 0⤊ 2⤋