2007-10-19 14:19:06 · 10 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
-30 = x -10 +11x
-20 = x+11x
-20 = 12x
-20/12 = x
-5/3 = x
Check
-30 = (-5/3) -10 + 11(-5/3)
-30 =(-5/3)-10 +-55/3
-30 =(-5/3)-(30/3)-(55/3)
-30 = (-5-30-55)/3
-30 = -90/3
-30 = -30 It checks!
2007-10-19 14:33:47 · answer #1 · answered by james w 5 · 0⤊ 0⤋
lol british C is an idiot. -30=x-10+11x
-20=x+11x
-20=12x
-20/12 = -1 2/3
to check, you simply plug in -1 2/3 where ever there was the value x in the equation.
-30 = (-1 2/3)-10-18 1/3
-30 = -20 - 10
-30 = -30
2007-10-19 21:30:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Combine like terms (i.e., those with x and those without). The best procedure is to move the two types to opposite sides of the equal sign (by performing the same operation to both sides of the equation).
-30=x-10+11x
-30+10=x-10+11x+10 (add 10 to both sides)
simplify
-30+10=-20
-20=x+11x (note that -10+10=0)
The right-hand-side simplifies
-20=12x
Because you are looking for 'x' you have to get rid of that 12
-20/12 = 12x/12 (divide both sides by 12)
-20/12 = x
(-1*2*2*5)/(2*2*3)=x
remove the common factors of -20 and 12, x simplifies to
-5/3=x
2007-10-19 21:29:17 · answer #3 · answered by sefarkas 2 · 0⤊ 0⤋
Combine like terms to get
-30 = 12x -10
Add 10 to both sides to get
-20 = 12x
Divide both sides by 12 to get
-20/12 = x = -5/3
Check:
-30 = -5/3 -10 + 11 (-5/3)
-30 = -5/3 -10 -55/3
-30 = -60/3 - 10
-30 = -20 - 10
-30 = -30
2007-10-19 21:27:38 · answer #4 · answered by G.V. 6 · 0⤊ 0⤋
-30=x-10+11x
+10 +10
-20=x+11x
-20=12x
x=-20/12
=-10/6
=-5/3
2007-10-19 21:31:29 · answer #5 · answered by Cameron S 2 · 0⤊ 0⤋
-30 = 12x - 10
-20= 12x
-20/12 = x
-5/3 = x
-30 = -5/3 -10 +11(-5/3)
-30 = -5/3 - 10 -55/3
-30 = -60/3 - 10
-30 = -20 -10
-30 = -30
2007-10-19 21:25:25 · answer #6 · answered by Ms. Exxclusive 5 · 0⤊ 0⤋
- 30 = 12x - 10
- 20 = 12 x
x = - 5 / 3
Check
(-5/3) - 10 - 55/3
= - 60/3 - 10
= - 20 - 10
= - 30
2007-10-20 02:43:18 · answer #7 · answered by Como 7 · 0⤊ 0⤋
x= -20/12 OR -1.6 repeating.
It's simple to check your work - you just plug the answer in so it'd be -30=(-1.6)-10+11(-1.6) . If the same number is on both the sides, then your answer is correct.
gluck!
2007-10-19 21:29:11 · answer #8 · answered by Anonymous · 0⤊ 1⤋
i am not sure how u can check but i know that the answer is x= -4 i am postive on that i worked it out on paper. steps. first you combine you x's and then you cange the minus sign to a postive sign then divide 10 from 40 and you get - 4
2007-10-19 21:25:22 · answer #9 · answered by british c 1 · 0⤊ 2⤋
-30=x-10+11x
-30+10=x+11x-10+10
-20=12x
-20/12=12x/12
-5/3=x
x=-5/3
-5/3-10+11(-5/3)=-30
-5/3+-55/3-10=-30
-60/3-10=-30
-20-10=-30
-30=-30
YAY!!
2007-10-19 21:45:13 · answer #10 · answered by Sanchez_150 2 · 0⤊ 0⤋