kinkin79
13.09.2020 •
Mathematics
3x over x + 2 = 5 over 9
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Ответ:
Ответ:
multily to cancel fractions
9(x+2)
multiply both sides by 9(x+2)
9 times 3x=5 times (x+2)
27x=5x+10
subtract 5x
22x=10
divide by 22
10/22=aprox 0.454545454545...
x=0.455
Ответ:
x=-8
Step-by-step explanation:
-4(2x+3) = 2x+6-(8x+2)
The first step is to distribute the -4 and the -1
-4*2x+-4*3 = 2x+6 -8x-2
-8x-12 = 2x+6-8x-2
Combine like terms
-8x-12 = -6x+4
Add 8x to each side
-8x+8x-12 = 8x-6x+4
-12 = 2x+4
Subtract 4 from each side
-12-4 = 2x+4-4
-16 = 2x
Divide by 2
-16/2 = 2x/2
-8=x