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Wittaler [7]
3 years ago
9

sum of two numbers is 39. the greater number is 7 more than the smaller number. ( set up an equation )

Mathematics
2 answers:
andrey2020 [161]3 years ago
5 0
Let the two numbers be x and y with x being the greater number.

Given,

x = 7 + y 

Also given,

x + y = 39

Substituting the value of x from above,

7 + y + y = 39

7 + 2y = 39

2y = 39 - 7

2y = 32

y = \frac{32}{2}

y = 16

x = 7 + y

x = 7 + 16

x = 23

Hence, the two numbers are 23 and  16.
expeople1 [14]3 years ago
4 0

x + y =39

x = y+7

y+7 +y = 39

2y +7 = 39

2y =32

y = 32/2 = 16

x = 16+7 = 23

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