Question

por favor me ajudem a resolver essas equações.
5x+3x9=16
x+x+8=54
7x-2-5x=18
12x-10x-4=3
-x-2x-4=11
8x=5x+4,5

Answer 1

(1°)
5x +3x = 16
8x = 16
x = 16/8
x = 2

(2°)
x+x+8=54
2x=54-8
2x = 46
x = 46/2
x = 23

(3°)
7x-2-5x=18
7x-5x = 18+2
2x = 20
x = 20/2
x = 10

(4°)
12x-10x-4=3
12x-10x=3+4
2x = 7
x = 7/2

(5°)
-x-2x-4=11
-x-2x = 11+4
-3x = 15 (.-1)
3x = -15
x = -15/3
x = -5

(6°)
8x=5x+4,5
8x-5x = 4,5
3x = 4,5
x = 4,5/3
x = 1,5