Hola! :3
Resolvemos:
(3/4)(x-1)=(7/5)(3x+4)
(3x-3)/4=(21x+28)/5
5(3x-3)=4(21x+28)
15x-15=84x+112
-15-112=84x-15x
-127=69x
-127/69=x
x/4+1=4
x/4=4-1
x/4=3
x=3(4)
x=12
Espero haberte ayudado :D
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Hola! :3
Resolvemos:
(3/4)(x-1)=(7/5)(3x+4)
(3x-3)/4=(21x+28)/5
5(3x-3)=4(21x+28)
15x-15=84x+112
-15-112=84x-15x
-127=69x
-127/69=x
x/4+1=4
x/4=4-1
x/4=3
x=3(4)
x=12
Espero haberte ayudado :D