Respuesta :
1: -(-2h+6) = -26
2h - 6 = -26
2h = -20
h = -10
2: -7(x+5) = 105
7x + 35 = 105
7x = 70
x = 10
3: 4(x+4) = 2(x+2)
4x + 16 = 2x + 4
2x =-12
x = -6
4: 5(x-3) -2.5 = 20
5x - 15 - 2*5? = 20
5x - 25 = 20
5x = 55
x = 11
5: -(-2x+5) = -2 (x+4)+19
2x - 5 = -2x - 8 + 19
4x - 5 = -8 + 19
4x - 5 - 11 = 0
4x - 16 =0
4x = 16
x = 4
6: 3/4 y= 5/6
Multiplicas cruzado
3*6 = 5*4y
18 = 20y
18/20 = y
9/10= y
sALUDOS , hice lo que entendi porque hay un ejercicio 2.5 que puede ser 2,5 o 2*5 ai vés tu.
1: -(-2h+6) = -26
+2h - 6 = - 26
2h = - 26 + 6
h = - 20 / 2
h = - 10
2: -7(x+5) = 105
-7x - 35 = 105
-7x = 105 + 35
x = 140 / - 7
x = - 20
3: 4(x+4) = 2(x+2)
4x + 16 = 2x + 4
4x - 2x = 4 - 16
2x = - 12
x = - 6
4: 5(x-3) -2.5 = 20
5x - 15 - 2.5 = 20
5x - 17 .5 = 20
5x = 20 + 17.5
x = 37.5 /5
x= 7.5
5: -(-2x+5) = -2 (x+4)+19
+ 2x - 5 = -2x - 8 + 19
2x + 2x = - 8 + 19 + 5
4x = 16
x = 16/4
x = 4
6: 3/4 y= 5/6
y = 5/6 : 3/4
y = 24/18
y = 4/3
espero que te sirva, salu2!!!!