EM-2387

Percentages

E Math · Secondary 4 · Hard · Percentages

Given that

y

is 40% of

z

and that

3y + 20 = z

, find the values of

y

and

z

.

$y = 40,\ z = 100$
$y = -40,\ z = -100$
$y = 20,\ z = 50$
$y = -20,\ z = -50$

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