a) 3x-6 →→→ - 5 = 3 b) 3a-9b 2a-4b →→→→ - →→→→ = 3 2 c) 2x+6 6x-9 →→→→ - →→→ = 2 3 d) x -7 x-1 4 × →→→ + 9 × →→→→ 2 3

a) 3x-6 _______-5= (*3) 3 3(3x-6/3)-3*5= 3x-6-15= 3x=21 x=7 B) (3a-9b)/3-(2a-4b)/2=(*6) 6(3a-9b)/3-6(2a-4b)/2= 2(3a-9b)-3(2a-4b)= 6a-18b-6a+12b=-8b c) (2x+6)/2-(6x-9)/3=(*6) 6(2x+6)/2-6(6x-9)/3 3(2x+6)-2(6x-9)= 6x+18-12x+18=-6x d) 4(x-7)/2+9(x-1)/3= 2(x-7)+3(x-1)= 2x-14+3x-3= 5x-17= 5x=17 x=3i2/3