【1】5/4;1.4=75%;x 【2】4x+5×0.7=19/2
2个回答
(5/4)/1.4=0.75/X等式两边交叉相乘:5X/4=0.75*1.4 X=1.05*4/5=0.84
2*(4X+5*0.7)=19 8X+7=19 8X=19-7=12 X=12/8=1.5
相关问题
(1)9x-3x=7.2 (2)17.5÷x=1.4 (3)x×10.5=0.63 (4)(x+5.8)×0.8=19.
1.x+1/5-4/7x=7/4 2.3.6*0.5-0.75x0.8
①4x-7×1.3=9.9;②1 1 2 :0.4=1.35:x;③(2+5+8+…+197)÷(4+7+10+…+19
解方程;2(X-0.7)=4.8 1/8(X+0.5)=75% 9*8-4X=60 5X-20%X=19.2 3X-0.
求未知数x1.X-5/7X=1/14 2.X×(5/6+0.625)=7/203.2/3X+0.75X=1/6 4.6×
解方程(或比例). ① 1 4 x+0.75=2 ② 1.2 7.5 = 0.4 x ③3X÷ 3 4 = 4 5 .
1.25/47=0.75:x 8/x=2/5 0.6/19=1.5:x 3/4:5/12=x:2/
1/2x+3=1/3x+2 0.5x-0.7=6.5+0/2x 1-7/3x=2/3x+19 0.4x-1/4=8-1/
解方程 (1)8x-16=0 (2)2.4x+1.2×2=7.2 (3)12.5x-6x=19.5
(4.5-x)*7=17.5 x/2+4=3/2x+1 7/2*2/3-4x=7/3 5/8(x-.3)=75% 1+x