Question

resolva as equações
5x+3x=16
x+x+8=54
7x-2-5x=18
12x-10x-4=3
-x-2x-4=11
8x=5x+4,5
me ajudem aeh rs

Answer 1

5x+3x=16
8x=16
x=16/8
x=2

x+x+8=54
2x+8=54
2x=54-8
2x=46
x=46/2
x=23

7x-2-5x=18
7x-5x=18+2
2x=20
x=20/2
x=10

12x-10x-4=3
12x-10x=3+4
2x=7
x=7/2
x=3,5

-x-2x-4=11
-x-2x=11+4
-3x=15
x=15/3
x=-5

8x=5x+4,5
8x-5x=4,5
3x=4,5
x=4,5/3
x=1,5

Answer 2

5x+3x=16 8x=16 X=16/8=2 x+x+8=54 2x= 54-8 2x=46 x=46/2=23 7x-2-5x=18 7x-5x=18+2 2x=20 x=20/2=10 12x-10x-4=3 12x-10x=4+3 2x=7 x=7/2 -x-2x-4=11 -3x=11+4 -3x=15(-1) 3x=-15 x=-15/3=5 8x=5x+4,5 8x-5x=4,5 3x=4,5 x=4,5/3= 1,5