Question

1) 6×+3+2 (×-4)=7 (×+2
2) 2(2×+1)-3 (3×-5)=4×-19
3) 4(3×-5)+3 (4×-7=10×-13
4) 5(2×-1)-3×+6 (×+2)=15+9×
5) -2×+4+5 (-×+2)=-3 (2×-7)
6) 5(2×+1)-2 (3×+2)+3×=13-5×

Answer 1

Răspuns:

6x+3+2x-8=7x+14

8x-5=7x+14

8x-7x=14+5

x=19

2). 4x+2-9x+15=4x-19

-5x+17=4x-19

-5x-4x=-19-17

-9x=-36

x=4

3). 12x-20+12x-21=10x-13

24x-41=10x-13

24x-10x=-13+41

14x=28

x=2

4). 10x-5-3x+6x+12=15+9x

13x+7=15+9x

13x-9x=15-7

4x=8

x=2

5). -2x+4-5x+10=-6x+21

-7x+14=-6x+21

-7x+6x=21-14

-x=7

x=-7

6). 10x+5-6x-4+3x=13-5x

7x+1=13-5x

7x+5x=13-1

12x=12

x=1