Question

How do I work out this equation 7x+5=8x-25

Answer 1

Subtract 7x from 8x then add 25 to 5 then divide what you get when you subtract 7 from 8 by what you get when you add 25 to 5 and that's your answer ( add x to the answer).

Answer 2

    7x + 5 = 8x - 25
         -  5 = -8x -5
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7x - 8x = - 5 - 25

-1x = - 30
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 -1        -1

x = 30