a). 5x – 8 = 4x +9
b) 3-10x = 9 - 4x
c). 4x+5 = 2x - 3
d).4x+5x+2 = 4 -7x+6
e). 5x + 10 = 8x + 9
NA TERAZ


Odpowiedź :

[tex]a)\\5x-8=4x+9 /-4x\\5x-4x-8=9/+8\\x=9+8\\x=17[/tex]

[tex]b) \\3-10x=9-4x /+4x\\3-10x+4x = 9 /-3\\-6x=6 /:(-6)\\x = -1[/tex]

[tex]c) \\4x+5=2x-3 /-2x\\2x + 5 = -3 /-5\\2x = -8 /:2\\x = -\frac{8}{2}\\x = -4[/tex]

[tex]d) \\4x+5x+2=4-7x+6\\9x+2=10-7x /+7x\\16x+2=10/-2\\16x=8 /:16\\x = \frac{8}{16}\\x = \frac{1}{2}\\x = 0,5[/tex]

[tex]e) \\5x+10=8x+9 /-8x\\-3x+10=9 /-10\\-3x = -1 /:(-3)\\x = \frac{1}{3}[/tex]