知识问答
最佳答案:1.3/7 × 49/9 - 4/32.8/9 × 15/36 + 1/273.12× 5/6 – 2/9 ×34.8× 5/4 + 1/45.6÷ 3/8 –
最佳答案:1.解方程4(x+5)+8=804x+20+8=804x=52x=132.化简求值当x=12.5,y=2.5时,求2y+8x-8y的值.2x 2.5+8 (12
最佳答案:4x=4,x=14x=8,x=24x=12,x=34x=16,x=44x=20,x=54x=24,x=64x=28,x=74x=32,x=84x=36,x=94