i need help solveing some equations, i dont ned the answer but i want to know how to do them
x-(-4)=15
8x-2=2(x+5)
x
- = -2 {fraction}
10
2007-09-25 13:39:13 · 5 answers · asked by guppy 1 in Education & Reference ➔ Homework Help
(Q1) x-(-4)=15
x+4=15
x=15-4
x=11 <==answer
(Q2) 8x-2=2(x+5)
8x-2=2x+2(5)
8x-2=2x+10
8x-2x=10+2
6x=12
x=12/6
x=2 <==answer
(Q3) x/10=-2
x/10=-2
x=-2(10)
x=-20 <==answer
2007-09-27 22:57:15 · answer #1 · answered by bzyb 2 · 0⤊ 0⤋
i'll try. here u go:
x-(-4)=15 can also be written as x + 4=15. minusing a neg # is equavilent to adding a pos #.
x + 4= 15
-4 -4
x = 11
8x-2=2(x+5)
distributive property 8x-2= 2x+10
-2x -2x
6x-2= 10
+2 +2
6x= 12
x= 2
2007-09-25 20:51:06 · answer #2 · answered by Brave 2 · 0⤊ 0⤋
1. x=19
2007-09-25 20:47:05 · answer #3 · answered by Top Contributor 3 · 0⤊ 0⤋
x-(-4)=15 x=19
8x-2=2(x+5) x=i don't know, sorry
x
- = -2 {fraction} x=(-5)
10
2007-09-25 20:53:21 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Just move things around until you get x's on one side and numbers on the other.
2007-09-25 20:44:48 · answer #5 · answered by Beardo 7 · 0⤊ 0⤋