1.

25 subtracted from 7 times a number is equal to 30 added to 6 times it, find the number.

Answer»

let the no. be x

25 - 7x = 30 + 6 ( 25-7x )

25 - 7x = 30 + 150 - 42x

-7x -42x = 180 -25

-35x = 145

x = 145

-35

x = - 4.14 approx.

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