(7X-3)\7=(1+15X)\5
5个回答
两边同乘35
5(7x-3)=7(1+15x)
35x-15=7+105x
105x-35x=-15-7
70x=-22
x=-11/35
相关问题
(X+1)(X+3)(X+5)(X+7)+15
(x+1)(x+3)(x+5)(x+7)+15=0
(x+1)(x+3)(x+5)(x+7)+15因式分解
因式分解 (x+1)(x+3)(x+5)(x+7)+15
1/5(x+15)=1/2-1/3(x-7) 6(X+15)=15-10(X-7) 6X+90=15-10X+70 6X
因式分解:1.(x+1)(x+3)(x+5)(x+7)+15
一元一次方程题①3x=12+2x;②-6x-7=-7x+1;③5x+(x+1)=19;④3(x-7)+5(x-4)=15
1/3X1/5=1/15=(1/3-1/5)X1/2,1/5X1/7=1/35=(1/5-1/7)X1/2,1/7X1/
15-2x=7.5 1.6÷x=2.4÷0.15 2.7÷0.3-7x=5.5 18x-4x-2.5x=3.68 3.6
x-([1/3]+[2/3])=[7/12] 2x+[7/9]=[7/9] 15x-4.5×2=51 7x+3x+26=