officialgraciela67
27.09.2019 •
Mathematics
The sum of three numbers is 69. the second number is equal to the first diminished by 8, and the third number is 5 times the first.
if x represents the first number, then which of the following equations could be used to determine the values of all of the numbers?
a x= 6x-8
b 69=6x-8
c 69=7x-8
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Ответ:
Because the numbers are 11,3,55.
Ответ:
first one x= -9/7y+-10/7, second x=2/3y+25/3
1. Step-by-step explanation:
add 9y to both sides -7x-9y+9y=10+9y
divide both sides by -7. -7x/-7=9y+10/-7
2. Add 2y to both sides. 3x-2y+2y=25+2y
divide both sides by 3. 3x/3=2y=25/3