Answer:
see explanation
Explanation:
given
2x ÷ 4 = 10 or
= 10 ( multiply both sides by 4 )
2x = 40 ( divide both sides by 2 )
x = 20
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(b)
He may have mistaken the ÷ for a - (subtraction sign )
2x - 4 = 10 ( add 4 to both sides )
2x = 14 ( divide both sides by 2 ), leading to
x = 7 ← the incorrect answer he obtained