B.LET X= SAM’S CURRENT AGE AND 3X= JOHN’S CURRENT AGE. IF JOHN WIL...

30. b.Let x= Sam’s current age and 3x= John’s current age. If John will be twice as old as Sam in six years,this sets up the equation 3x+ 6 = 2 (x+ 6). Solve this equation for xby using the distributive propertyon the right side of the equation and then subtracting 2xfrom both sides. 3x+ 6 = 2x+ 12. 3x– 2x+ 6= 2x– 2x+ 12. Subtract 6 from both sides.x+ 6 – 6 = 12 – 6.x= 6. Since xis Sam’s current age, Samwas four years old two years ago.

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