5x + 4 = 10x - 5 10x - 5x = 4 + 5 5x = 9 x = 1.8
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
10x - 18 = 5x + 2 Add -5x + 18 to both sides of the equation, to get: 5x = 20, from which x = 4.
5x + 4 = 10x - 5 10x - 5x = 4 + 5 5x = 9 x = 1.8
10x+7 = 5x+32 10x-5x = 32-7 5x = 25 x = 5
If: 10x+7 = 5x+22 Then: 10x-5x = 22-7 And: 5x = 15 So: x = 3
5x+8 = 10x+35x-10x = 3-8-5x = -5x = 1 and by substituting the value of x into the equations y = 13
30 + 5x = 15 + 10x 30 = 15 + 5x 15 = 5x x = 3
10x - 5x + 5x = 10x
-10x + 5x = -5x
10x - 15x + 5 = -45 + 40Combine like terms:-5x + 5 = -5Get the x term alone (subtract 5 from both sides):-5x = -10Divide both sides by -5x = 2
x = 10x, so derivative = 10
10x - 18 = 5x + 2 Add -5x + 18 to both sides of the equation, to get: 5x = 20, from which x = 4.
x=-3
6-3x = 5x-10x+2 4 = 8x-10x 4 = -2x x = -2