Question

Oblicz x:
1. 9-7x=35
2. 1 3/4+2x= -3 1/4
3. 3x+1/7=2x
4. 4(2x-3)-4=3(x+1)+2
Proszę o wszystkie obliczenia :)

Answer 1

1.
9-7x=35
-7x = 35 - 9
-7x = 26
x = -26/7
x = -3 5/7
2.
1 3/4+2x= -3 1/4
2x = -3 1/4 - 1 3/4
2x = -5
x = -5/2
x = -2 1/2
3.
3x+1/7=2x
3x - 2x = -1/7
x = -1/7
4.
4(2x-3)-4=3(x+1)+2
8x - 12 - 4 = 3x + 3 + 2
8x - 3x = 5 + 16
5x = 21
x = 21/5
x = 4 1/5

Answer 2

9-7x=35
7x=35-9
7x=24/7
x=24/7
x=3 3/7


1 3/4+2x= -3 1/4
7/4+2x=-13/4
2x=-13/4-7/4
2x=-20/4
2x= - 5/:2
x= -5/2=-2 1/2

3x+1/7=2x
3x-2x=-1/7
x=-1/7

4(2x-3)-4=3(x+1)+2
8x-12-4=3x+3+2
8x-3x=3+2+12+4
5x=21/:5
x=21/5=4 1/5