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it says to solve the equation and write a reason for each step.

44-2(3x+4)=18x

4(5x-9)=-2(x+7)

2x-15-x=21+10x

3(7x-9)-19x=-15

2007-09-30 15:13:57 · 3 answers · asked by ihearttwirling 3 in Science & Mathematics Mathematics

3 answers

44-2(3x+4)=18x
Remove the brackets:
44 - 6x + 8 = 18x
Transpose like terms:
44 - 8 = 18x + 6x
Collect like terms:
36 = 24x
Divide by 24:
x = 36/24
Simplify:
x = 3/2 = 1.5

4(5x-9)=-2(x+7)
Remove the brackets:
20x - 36 = -2x - 14
Transpose like terms:
20x + 2x = 36 - 14
Simplify:
22x = 22
Divide by 22:
x = 1

2x-15-x=21+10x

3(7x-9)-19x=-15

2007-09-30 15:24:33 · answer #1 · answered by Robert S 7 · 0 0

44-2(3x+4) = 18X -- get rid of brackets
44-6x-8 = 18x----add like terms together
36 = 24X -- --
x = 3/2

4(5X-9) = -2(x+7) ----breackets
20X-36 = -2x-1 ----collect like terms
22x= 22
x=1

2x-15-x=21+10x -- Combine, join, or Bring together like terms
-13x=36
x=-3

3(7x-9)-19x=-15
21x-27-19x = -15
2x = 12
x=6

you can break it up into what ever steps you want, but the ordedr that you do stuff in is always the same.

2007-09-30 15:28:50 · answer #2 · answered by ivan k 5 · 0 0

Well just use order of operations, not sure what it means by reason, but your answers should be:

1.5
1
-4
6

I did those kind of fast, but you can check with me.

2007-09-30 15:18:35 · answer #3 · answered by Eric S 2 · 0 0

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