Question

sum of two numbers is -18 one number is 58 what will be another number?​

Answer 1

Answer:

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Step-by-step explanation:

The sum of two numbers is 18 and their difference is 58. What are the two numbers? Let's start by calling the two numbers we are looking for x and y.

The sum of x and y is 18. In other words, x plus y equals 18 and can be written as equation A:

x + y = 18

The difference between x and y is 58. In other words, x minus y equals 58 and can be written as equation B:

x - y = 58

Now solve equation B for x to get the revised equation B:

x - y = 58

x = 58 + y

Then substitute x in equation A from the revised equation B and then solve for y:

x + y = 18

58 + y + y = 18

58 + 2y = 18

2y = -40

y = -20

Now we know y is -20. Which means that we can substitute y for -20 in equation A and solve for x:

x + y = 18

x + -20 = 18

X = 38

Summary: The sum of two numbers is 18 and their difference is 58. What are the two numbers? Answer: 38 and -20 as proven here:

Sum: 38 + -20 = 18

Difference: 38 - -20 = 58

Answer 2

Answer:

-76

Step-by-step explanation:

58+(-76). +×-= -

58-76

= -18

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