Question

7/5 (1+3/7x)=x
3/11 × (7/3x-2)=x
3 (4÷x-1)=5
1/4 (5-1/6÷x)=1/x
2/5 (3+1/4÷x)=1/x
Calculați ecuațiile in Q

Answer 1

a) 7/5 ×(1+3/7x)=x
7/5 +3/5x=x
7+3x=5x
3x-5x=-7
-2x=-7 /×(-1)
2x=7
x=7/2

b)3/11×(7/3x-2)=x
7/11x- 6/11=x
7x-6=11x
7x-11x=6 =>-4x=6
x=-3/2

c)3×(4÷×-1)=5 => x nu este egal cu o
3(4/x -1)=5
12/x -3=5 =>12/x=5+3
12/x=8 =>12=8x
8x=12 =>x=3/2, x nu e egal cu o

d)1/4×(5-1/6÷x)=1/x => x nu este egal cu o
4×1/4×(5- 1/6÷x)=4/x
5-1/6×1/x=4/x
5- 1/6x=4/x
-1/6x -4/x=-5
-25/6x=-5
-25=-30x
-30x=-25
x=5/6 ,x nu e egal cu o

e)2/5×(3+1/4÷x)=1/x =>x nu e egal cu o
2/5×(3+1/4 × 1/x)=1/x
2/5×(3+1/4x)=1/x
6/5+1/10x=1/x
1/10x-1/x=-6/5
-9/10x=-6/5
-45=-60x =>-60x=-45
x=3/4, x nu este egal cu o