325y
17
The answer is 5
x + y = 13 x - y = 5 ------------ 2x = 18 x = 9 y = 4 Verification: 9 + 4 = 13 and 9 -4 = 5
2x + y = 5 so y = 5 - 2x; This gives x - 3(5 - 2x) = 13 ie x + 6x = 13 + 15 so x = 4 and y must be -3
#1). x = 0, y = -13 #2). x = 1, y = -7 #3). x = 2, y = -1 #4). x = 3, y = 5 #5). x = 4, y = 11
103
1. x + y = 22. y = 2x - 13Rewriting 2. as:3. 2x - y = 13Adding 1 & 3 gives:4. 3x = 15x = 5Substituting x = 5 into 1. gives:5 + y = 2y = 2 - 5y = -3Checking values by substituting x = 5 and y = -3 into 2 gives:-3 = (2 * 5) - 13-3 = 10 - 13-3 = -3Therefore x = 5 and y = -3.
If you mean: y = 4x-2 and y = x+13 then x = 5 and y = 18
If: x+y = 8 and 2x-y = 5 Then by adding the equations together: 3x = 13 or x = 13/3 By substitution into the original equations: x = 13/3 and y = 11/3
1
Solved for y: y=(3x-13)/5 Solved for x: x=(5y+13)/3
x + y = 82x - y = 5-------------------- add together to eliminate y3x = 13x = 13/3Substitute for x in one of the original equations:(13/3) + y = 8y = 24/3 - 13/3y = 11/3x=13/3 & y=11/3