-4 (-9 +5 = -4)
13 ? 15
5. Just do 9 minus 4. 5 plus 4 equals 9
|x + 1| - |x + 4| = 0 ∴ |x + 1| = |x + 4| ∴ x + 1 = -x - 4 ∴ 2x = -5 ∴ x = -5/2
y = 2x+5 x+y = 4 Substitute the value of y into the second equation: x+2x+5 = 4 x+2x = 4-5 3x = -1 Divide both sides by 3 to find the value of x: x = -1/3 Substitute the value of x into the original equations to find the value of y: x = -1/3 and y = 4 and 1/3
-4 (-9 +5 = -4)
4
13 ? 15
5
5. Just do 9 minus 4. 5 plus 4 equals 9
If: x4 = 5 Then: x = 1.4953487812
4/5
In C: x = 5 always means assign the value of 5 to x; x == 5 always means compare the value of x with 5.
2x - 6 = 4 2x = 4 + 6 = 10 x = 10/2 = 5 ∴ x = 5
|x + 1| - |x + 4| = 0 ∴ |x + 1| = |x + 4| ∴ x + 1 = -x - 4 ∴ 2x = -5 ∴ x = -5/2
y = 2x+5 x+y = 4 Substitute the value of y into the second equation: x+2x+5 = 4 x+2x = 4-5 3x = -1 Divide both sides by 3 to find the value of x: x = -1/3 Substitute the value of x into the original equations to find the value of y: x = -1/3 and y = 4 and 1/3
5X - 2Y X = 9 Y = 4 5(9) - 2(4) 45 - 8 37 is the value