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Linear Equation in One Variable

Solve the fol...

Question

Solve the following equation and check your results:
$3 x = 2 x + 18$

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Solution

Transpose $2 x$ to LHS,
$3 x - 2 x = 18$
$x = 18$

LHS $= 3 x = 3 \times 18 = 54$
RHS $= 2 x + 18 = (2 \times 18) + 18 = 36 + 18 = 54$
LHS $=$ RHS

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