Question

alguem pode me ajudar nesses exercicio, a d NAO TEM N SEI PORQUE

7x-10= -3x
2,5-4x=78,5
3x-8x=x+3
7x-2,5x=22-x
-4x/5+3/2=x-8
x-3/3+3/2=4x/3

Answer 1

7x-10= -3x
7x+3x=10
10x=10
x=10/10
x=1

2,5-4x=78,5
-4x=78,5-2,5
-4x=76 ·(-1)
4x=-76
x=-76/4
x=-19

3x-8x=x+3
3x-8x-x=3
-6x=3 ·(-1)
6x=-3
x=-3/6
x=-1/2

7x-2,5x=22-x
7x-2,5x+x=22
5,5x=22
x=22/5,5
x=4

-4x/5+3/2=x-8
-(4x/5)-x=-8-(3/2)
(-4x-5x)/5=(-16-3)/2
-9x/5=-13/2
-18x=65 ·(-1)
18x=65
x=65/18

x-3/3+3/2=4x/3
(2x-6+9)/6=4x/3
(2x+3)/6=4x/3
6x+9=24x
6x-24x=-9
-18x=-9 ·(-1)
18x=9
x=9/18
x=1/2