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8x+3x-7x-x = 14+4
3x=18
x= 18/3
x= 6
3) 9y-11=10+12y
9y - 12y = 10+11
-3y = 21
y= 21/ -3
y= -7
4) 5x+6 =10x+5
5x -10x= 5-6
-5x = -1
x = -1/-5
x= 1/5 = 0.2
5)y-5=3-25
y = 3- 25 +5
y = -17
6)4x+1=2
4x= 2-1
x= 1/4
7) 5x=8x-15
5x-8x= -15
-3x = -15
x= -15/-3
x= 5
La primera no me da disculpa!!!