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Francis
Mathematics
8 August, 16:56
Find a, (x-3) + (x-a) = 15
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Marques Woodard
8 August, 17:09
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a = 2x - 18
remove the parenthesis and simplify
x - 3 + x - a = 15
2x - 3 - a = 18 (add 3 to both sides
2x - a = 18 (subtract 2x from both sides)
- a = 18 - 2x (multiply through by - 1)
a = - 18 + 2x
a = 2x - 18
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