Question

x+x-2=17-2x+1 ?

outra equaçao

x+2x+3-5x=4x-9 ?

Answer 1

x+x-2=17-2x+1
x+x+2x=17+2+1
4x=20
x=20/4
x=5
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x+2x+3-5x=4x-9
x+2x-5x-4x=-9-3
-6x=-12 (-1)
6x=12
x=12/6
x=2

Answer 2

a)
x + x - 2 = 17 - 2x + 1
2x - 2 = 18 - 2x
2x + 2x = 18 + 2
4x = 20
x = 20/4
x = 5

b)
x + 2x + 3 - 5x = 4x - 9
3x + 3 - 5x = 4x - 9
- 2x + 3 = 4x - 9
3 + 9 = 4x + 2x
12 = 6x
6x = 12
x = 12/6
x = 2