(1)3x+11=77, 3x+11-11=77-11, 3x÷3=66÷3, x=22; (2)3(3x+6)=27, 3(3x+6)÷3=27÷3, 3x+6-6=9-6, 3x÷3=3÷3, 睁察粗 x=1; (没谨3)(x+6)÷6=8, (x+6)÷6×6=8×6, x+6-6=48-6, x=42; (4)6x-15=x, 6x-15+15=x+15, 6x-x=x+15-x, 5x÷5=15÷5, x=3; (5)15x+36-5x=108, 10x+36-36=108-36, 10x÷10=72÷10, x=7.2; (6)9x+9=15x, 9x+9-9x=15x-9x,悉镇 9÷6=6x÷6, x=1.5. |