Kto pomoże? 1. 7x-8y-12x-4y= 2. 15a+4b+3= 3. 4-9a+7b-a-7b= 4. 9x-14y-9x+20y= 5. 3+12x-6y-7+5x+2y= 6. 4x-7y+12x+14y= 7. 9x-12y+14x+12y= 8. 12+4a-7b-8a-12b+4= 9. 7xy-4ay+5xy+4ay= 10. 15x-12x-7x-4x+3x+7x=

1. 7x-8y-12x-4y= -5x-12y 2. 15a+4b+3= 15a+4b+3 3. 4-9a+7b-a-7b=-10a + 4 4. 9x-14y-9x+20y=6y 5. 3+12x-6y-7+5x+2y= -4 +17x -4y 6. 4x-7y+12x+14y=16x +7y 7. 9x-12y+14x+12y=23x 8. 12+4a-7b-8a-12b+4= 16 - 4a -19b 9. 7xy-4ay+5xy+4ay=12xy 10. 15x-12x-7x-4x+3x+7x= 2x