(3+5X/7)/(X-3)=4/5
1个回答
(3+5X/7)/(X-3)=4/5
两边乘以(x-3)
3+5X/7=4/5(X-3)
两边乘以35
105+25x=28x-84
3x=189
x=63
相关问题
3.4X5.3+5.9X4.7+2.5X5.3
计算:3/5X4/7÷3/5X4/7
(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
7x=2+3x 3.5x=28 5(x+8)-5=6(2x-7) 9(x-4)=7(4-x)
(5x-3)/4=3+(7x+5)/6
x+5 6x+4>7 x/3=7 3x=5*6 a
用线性代数解x1+3x2+5x3+7x4 =12,3x1+5x2+7x3+x4=0,5x1+7x2+x3+3x4=1,7
5x+3/(4+6)=5.3*(5-7)-2.5x
解方程:(1)4x=5+3x;(2)-4x-3=-5x-2;(3)-7x-6=22-6x;(4)3y+7=-3y-5.
x/2-5x+7/3≥1-3x-5/4