Question

please solve 8x + 21/4 = 3x+7

Answer 1

Hey your answer is
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8x+21/4=3x+7/1

$by \: cross \: multiplication$
1(8x+21)=4(3x+7)
=>8x+21=12x+28
=>12x-8x=28-21
=>4x=7
=>x=7/4