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15 = 8x - 5x
15 = 3x
15/3 = x
x=5
b).- 4x +1 = 2
4x = 2 - 1
4x = 1
x= 1/4
c).- y - 5 = 3y - 25
25 - 5 = 3y - y
20 = 2y
20/2 = y
10 = y
d).- 5x + 16 = 10x + 5
16 - 5 = 10x - 5x
11 = 5x
11/5 = x
Espero que te sirva.
15 = 8x - 5x
15 = 3x
5 = x
4x+1=2
4x = 2+1
4x = 3
x = 3/4
y-5=3y-25
25-5 = 3y - y
20 = 2y
10 = y
5x+16=10x+5
16 - 5 = 10x - 5x
11 = 5x
11/5 = x