1.
[tex]-2x+7x+x = 6x\\\\Odp. \ D.[/tex]
2.
[tex]a) \ 2y + 6y = 8y\\\\b) \ 4x-7x = -3x\\\\c) \ 7a+a-4a = 4a\\\\d) \ 4z+0,8z = 4,8 z[/tex]
3.
[tex]a) \ -4x\cdot(-3) = 12x\\\\b) \ \frac{x}{3}\cdot12 = 4x\\\\c) \ 18x:6 = 3x\\\\d) \ 18x:(-12) = -1,5x[/tex]
4.
[tex]7x - x = 6x \ - \ TAK\\\\\frac{1}{2}x\cdot(-12) = -6x \neq 6x \ - \ NIE\\\\4x+2x = 6x \ - \ TAK\\\\-12x:(-2) = 6x \ - \ TAK[/tex]
5.
[tex]a) \ -3y+2y+6y = 8y-3y = 5y\\\\b) \ -\frac{1}{3}x\cdot25 = -\frac{25}{3}x = 8\frac{1}{3}x[/tex]
6.
* + 4x - 5x = 3x
* = 3x - (4x - 5x) = 3x - 4x + 5x = 4x
4x + 4x - 5x = 3x
Odp. C.
