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The sum of two numbers is 85. The second number is 4 more than 2 times the first number. Let x represent the first number and let y represent the second number. What are the two numbers? Use the table to guess and check.

Numbers
x
y
x + y = 85
y = 2 x + 4





19 and 65
25 and 60
27 and 58
32 and 53

Respuesta :

palium
No need to guess, just math!

x + y = 85, so x = 85 - y
Let’s substitute this in the second equation

y = 2(85 - y) + 4
y= 170 - 2y + 4
3y = 174

y = 58

x = 85 - 58 = 27
[third option from the top]

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