The sum of 2 numbers is 49 and the difference is 3?

Science & Mathematics by Anonymous 2018-07-08 20:04:44

Social Science

9 answers

Anonymous

x + y = 49 x - y = 3 x = 26, y = 23
Anonymous

3/2=1.5 49/2+1.5=26 49/2-1.5=23
Anonymous

Here is the set up: x + y = 49 x - y = 3 2x = 52 x = 52/2 x = 26 Plug x = 26 into EITHER equation to find y. x + y = 49 26 + y = 49 y = 49 - 26 y = 23
Anonymous

You can make a simultaneous equation: x + y = 49 x - y = 3 Add together (note - y) 2x = 52 x = 26 substitute x = 26 in x - y = 3 26 - y = 3 23 = y Numbers are 23 and 26
Anonymous

(1) : a + b = 49 (2) : a - b = 3 You calculate (1) - (2) (a + b) - (a - b) = 49 - 3 a + b - a + b = 46 2b = 46 → b = 23 Recall (1): a + b = 49 a = 49 - b → a = 26
Anonymous

The numbers are 26 and 23
Anonymous

(49 ± 3)/2 = {52,46}/2 = 26,23
Anonymous

x + y = 49 x - y = 3________add 2x = 52 x = 26 y = 23 Numbers are 23 and 26
Anonymous

x+y = 49 x–y = 3 add 2x = 52 x = 26 y = 49–26 = 23