Question

ecuaciones de primer grado
1) 2x - 10 = 5 + x
2) 7 = 5 + 4x - 26
3) 10 - 15 = 5 + 2x
4) 2 (× - 10) = 5
5) 7 (2x - 1) = 3 (1 - x)
6) 12x - 10 +7x = 2 + 10x

Answer 1

solucion
2x - 10 = 5 + x
2x-x=5+10
x=15

7 = 5 + 4x - 26
7+26-5=4x
28=4x
x=28/4
x=7


10 - 15 = 5 + 2x
10-15-5=2x
-10=2x
2x=-10
x=-10/2
x=-5

2 (× - 10) = 5
2x-20=5
2x=20+5
2x=25
x=25/2

7 (2x - 1) = 3 (1 - x)
14x-7=3-3x
14x+3x=10
17x=10
x=10/17

12x - 10 +7x = 2 + 10x
12x-10x+7x=2+10
9x=12
x=12/9
x=4/3

saludos