2000028290
2000028290 2000028290
  • 02-05-2019
  • Mathematics
contestada

What is the value of x in the equation? 7 1 2 x + 3 2 3 = −13 A) −1 5 6 B) −2 1 6 C) −2 2 9 D) −2 5 9

Respuesta :

wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 02-05-2019

Answer:

C - 2 2/9

Step-by-step explanation:

7 1 /2 x + 3 2/ 3 = −13

Subtract 3 2/3 from each side

7 1 /2 x + 3 2/ 3 - 3 2/3 = −13 - 3 2/3

7 1/2x = -16 2/3

Change each mixed number to an improper fraction

7 1/2 = (2*7 +1)/2 = 15/2

16 2/3 = (3*16+2)/3 = 50/3

15/2 x = -50/3

Multiply each side by 2/15 to isolate x

2/15 * 15/2 x = -50/3 * 2/15

x = -100/45

Simplify

x = -20/9

Change back to a mixed number

9 goes into 20 2 times with 2 left over

x = -2 2/9

Answer Link

Otras preguntas

Heating zinc sulfide in the air causes the formation of
When was the battle of Hastings?
Work out the number that is halfway between 27 times 38 and 33 times 38.Show your working out aswell.
what are two human uses for mosses?
What are the origins of prevailing ideas about natural, ideal, and deviant bodies in sports and in society?
A box contains bags of crisps. Each bag of crisps weighs 25 grams. Altogether, the bags of crisps inside the box weigh 1 kilogram. How many bags of crisps are i
A pack of 9 toilet rolls costs £4.23 A pack of 4 toilet rolls costs £1.96 Which pack gives the better value for money? You must show all your working.
Put brackets in the expression below so that it's value is 45.024. 1.6 + 3.8 * 2.4 *4.2 (*= times )
a piece of wood is 180cm long, Tom cuts it into three pieces in the ratio 2:3:4 Work out the length of the longest piece
what did henry hudson claim land for