Call x the first number:
Then the second number must be 2x - 3
So x + (2x - 3) = 36
Now solve to get
3x - 3 = 36
3x = 39
x = 13
So the two numbers are 13 and (13 x 2) - 3 = 23
joan decided to use her calculator to find the sum of the first 15 counting numbers instead of the formula. By mistake she entered 16 numbers. She entered one number twice . Her answer was 4 more than a perfect square number. Which number did joan enter twice?
Let x represent the first number; 2x - 3 then represents the second number. x + 2x - 3 = 75 3x = 78 x = 26 2x - 3 = 49 So the numbers are 26 and 49.
25 and 14
18, 20 and 22
The way to know the Prime Numbers is to find out if they can only Multiplied Once ,The way to know Composite Numbers is to find out if they can be Multiplied Twice
Let the numbers be x and y If: x+2y = 3 and 2x+y = 27 Then the simultaneous equations work out as: x = 17 and y = -7
a=58.4615 b=5.2308 c=41.3076
The numbers are 14, 16 and 18.
= The sum of two numbers is -42 the first number minus the second number is 52 Find the numbers? =
joan decided to use her calculator to find the sum of the first 15 counting numbers instead of the formula. By mistake she entered 16 numbers. She entered one number twice . Her answer was 4 more than a perfect square number. Which number did joan enter twice?
The third number is 112, the numbers are 86, 86, 112, 172
Let x represent the first number; 2x - 3 then represents the second number. x + 2x - 3 = 75 3x = 78 x = 26 2x - 3 = 49 So the numbers are 26 and 49.
Add the first to itself.
25 and 14
11,33
Let the two numbers be x and y, then:Twice the first equals three times the second: 2x = 3yThree times their difference exceeds the second by 13: 3(x - y) = y + 13From equation (1) it is clear the first number (x) is greater than the second (y), so their difference is x - y.Equation (2) can be rearranged:3(x - y) = y + 13→ 3x - 3y = y + 13→ 3x = 4y + 13This gives two simultaneous equations:2x - 3y = 03x - 4y = 13which can then be solved to find the two numbers (x and y).
short answer 26 and 49 long answer let x = the first number let y = the second number x + y = 75 y = 2x - 3 substitute y into the first equation x + 2x - 3 = 75 3x = 78 x = 26 use the second equation to find y y = 2(26) - 3 y = 52 - 3 y = 49