5x-2(x+2)-3[x-2(3-5x)+7]
1个回答
=5x-2x-4-3(x-6+10x+7)
=3x-4-3(11x+1)
=3x-4-33x-3
=-30x-7
相关问题
解方程 2(x-3)=3(x-5)+7 5(x+2)=2(2x+7) 3(x-2)=x-(7-8x)
21-x/2+x/3-2x/5=x x+2/3+x=10-2x/7 9-3x-2/5=7-3x/6
3(X+2.5)=5x 3x+7=5x 7=5x-3x 2x=7 x=3.5 中的7是怎么来 的
(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
3-2<x+2 5x+5≥2x-7
5x-2=7x+8 3=3/2x+16 1-3/2x=3x+2/5
(x+1)(x+2)(x+3)(x+4)-(x^2+5x+3)(x^2+5x+7)=?
15=X/3+2 .(x+2)/3=(3-x)/2.(x-3)/4-(1+3x)/8.7-(X+5)/2=(2-X)/5
x1 + x2 + x3 + x4 + x5 = 7 4x1 + 2x2 + 3x3 + 2x4 - 2x5 = 5 x
解方程2+2x/1X3+2x/3X5+2x/5X7+2x/7X9=10