Solve and check result:

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Solution

Multiplying both sides by 5, we obtain

5x = 4(x + 10)

5x = 4x + 40

Transposing 4x to L.H.S, we obtain

5x − 4x = 40

x = 40

L.H.S = x = 40

R.H.S = =

L.H.S. = R.H.S.

Hence, the result obtained above is correct.

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