The sum of three numbers is 90. The third number is 10 less than the first. The second number is 3 times the third. What are the
numbers?
1 answer:
Answer:
16
26
48
Step-by-step explanation:
x + y + z = 90
z = x - 10 => x = z + 10
y = 3z
=>
(z+10) + 3z + z = 90
5z + 10 = 90
5z = 80
z = 16
x = z + 10 = 16 + 10 = 26
y = 3z = 3×16 = 48
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