Hello !
• 3x-2x+8 = 5+4-8x
x+8x= 9-8
9x = 1
x = 1/9
• 5x-5-2x+1 = 3-x
3x+x = 3+5-1
4x = 7
x = 7/4
• 26x-x-5 = -5
25x = -5+5
25x = 0
x = 0
[tex]4 {x}^{2} - 16 - 8 + 8 = 0[/tex]
[tex]4 {x}^{2} - 16 = 0[/tex]
[tex]4 {x}^{2} = 16[/tex]
[tex] {x}^{2} = 4[/tex]
[tex]x = \sqrt{4} = 2[/tex]
[tex]x = 2[/tex]
• 3x+3 = 4x-12
3x-4x = -12-3
-x = -15
x = 15/1 = 15
• 9x-7-8x = 5x-5
x-5x = -5+7
-4x = 2
x = -2/4