Answer: 164
Step-by-step explanation:
1) y-2=x 2) y+1=x 3) 6x+3y=6 4) 3x-y=-2
2x+y=8 2x-y=0 2x+y=2 y=2x+3
The answer is the first option: 1) > the quantity times minus all over
The explanation is shown below:
1. To solve this problem you must pply the following proccedure:
2. Move the term to the left member. As the variable is negative, multiply the expression by and change the direction of the sign:
Answer:
20 + 10 = 30
Step-by-step explanation:
The sum of x and y is 30. In other words, x plus y equals 30 and can be written as equation A:
x + y = 30
The difference between x and y is 10. In other words, x minus y equals 10 and can be written as equation B:
x - y = 10
Now solve equation B for x to get the revised equation B:
x - y = 10
x = 10 + y
Then substitute x in equation A from the revised equation B and then solve for y:
x + y = 30
10 + y + y = 30
10 + 2y = 30
2y = 20
y = 10
Now we know y is 10. Which means that we can substitute y for 10 in equation A and solve for x:
x + y = 30
x + 10 = 30
X = 20
Summary: The sum of two numbers is 30 and their difference is 10. What are the two numbers? Answer: 20 and 10 as proven here:
Sum: 20 + 10 = 30
Difference: 20 - 10 = 10
Add the ratios.. 2+3+5 = 10
Then divide 25kg by 10 and you will get 2.5
Multiply your ratio figures by 2.5 so it would be (2.5*2) : (2.5*3) : (2.5*5)
Making your answer 5 : 7.5 : 12.5
Answer: I think 9
Explanation: 72/8= 9