-42=-7/4y

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Solution for -42=-7/4y equation: 


y in (-oo:+oo)

-42 = (-7/4)*y // - (-7/4)*y

-((-7/4)*y)-42 = 0

(7/4)*y-42 = 0

7/4*y-42 = 0 // + 42

7/4*y = 42 // : 7/4

y = 42/7/4

y = 24

y = 24

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