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Sagot :
Answer:
x - 1
Step-by-step explanation:
4(x+5)-3(7+x)
4( x + 5) = 4x + 20
4x+20-3(7+x)
-3(7 + x) = -21 - 3x
4x+20-21-3x
4x + 20 - 21 - 3x = x-1
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